Helicopter
David, 1919, Aircraft, p. 25:
The helicopter is a machine which theorists of that school believe can fly straight up into the sky byecause its air screw propeller works on a vertical axis. This type of aircraft has never been successful, for the reason that the propeller does not lift. It simply pulls a stream-lined surface through the air. The lifting must be done by planes.
Early history
Gibbs-Smith, Aviation, 1970, p. 16:
The model helicopter—in use certainly since the 14th century as a toy—has recently been claimed by the Russian authorities to have been revived in 1754 with a twin contra-rotating rotor model operated by clockwork, made by the well-known scientist Michael Vasilyevitch Lomonosov, which is said to have flown successfully: but we have no documents. In 1768 the French mathematician, A. J. P. Paucton, in his Théorie de la Vis Archimède, suggested a man-carrying and man-powered helicopter with two helical screws (ptérophores), one to sustain it and the other to propel it: it was never built. But, oddly enough, this must rank was the first specific suggestion for horizontal aerial propulsion by an airscrew.
A source says the term was invented this way:
The word "helicopter" was coined in 1861 by Viscount Ponton d'Amécourt by combining the Greek words "helix" and "pteron".
Enclosing categories | Aircraft, Propulsion |
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Subcategories | |
Keywords | Propeller, USPC 244/17.11, CPC B64C27/00, CPC B64C29/00, CPC G05D1/0858 |
Start year | |
End year |
This wiki has 278 patents in category "Helicopter".
Other techtypes related to Helicopter: AU 90.3, CA 244/15, CA 244/16, CA 244/17, CA 244/18, CA 244/19, CA 244/20, CA 244/5, CA 244/6, CPC B64C, CPC B64C27/04, CPC B64C27/06, CPC B64C27/26, CPC B64C29/00, CPC B64C29/0025, CPC B64C29/0066, CPC B64D2700/62587, CPC G05D1/0858, DE 77, Helicoplane, IPC B64C, USPC 244, USPC 244/17.11, USPC 244/17.17, USPC 244/26, USPC 244/6, USPC 244/7
Patents in category Helicopter
- Patent CH-1910-52815 (English title: Aircraft, Inventors: Thomas Augustus Dring)
- Patent IT-1908-94217 (English title: Helicopter using parabolic propeller, with methods for launch and parachute, Inventors: Achille Bertelli • Achille Bertelli fu Alessandro)
- Patent IT-1908-98977 (English title: Propelling and sustaining helix for airplanes, helicopters, and the like, Inventors: Azeglio Pineschi • Lamberto Pineschi)
- Patent ES-1910-48007 (English title: Flying machine, Inventors: Thomas Augustus Dring)
- Patent IN-1910-262 (Inventors: Thomas Augustus Dring)
- Patent BE-1914-257316.269391 (English title: New aviation machine, actually an airplane-helicopter hybrid, if not an outright helicopter, Inventors: J.-C.-A. Storms • L.-J.-U. Storms)
- Patent BE-1914-257316 (English title: New aviation machine, actually an airplane-helicopter hybrid, if not an outright helicopter, Inventors: J.-C.-A. Storms • L.-J.-U. Storms)
- Patent BE-1913-252450 (English title: Crazy wings(or possibly propeller blades) for airplane, Inventors: A. Sainte-Croix)
- Patent BE-1913-250406.252841 (English title: Autoglider “Aéra” with propellers of ascension, Inventors: Alfred E. Wunderlich)
- Patent BE-1912-250406 (English title: Autoglider “Aéra” with propellers of ascension, Inventors: Alfred E. Wunderlich)
- Patent BE-1912-250457 (English title: Ascension propeller “Aéra”, Inventors: Alfred E. Wunderlich)
- Patent BE-1913-250457.252822 (English title: Ascension propeller “Aéra”, Inventors: Alfred E. Wunderlich)
- Patent IT-1908-94537 (English title: Aerial locomotion apparatus, Inventors: Joseph Chantraine)
- Patent BE-1907-201848 (English title: Aviator or flying machine, Inventors: J.-L. Senden)
- Patent US-1849-Smith (English title: Helicopter, Inventors: Henry J. Smith)
- Patent FR-1855-13038 (English title: Helicopter, with precise aperture and other detailed information also included within patent(?), as inferred from cross-referencing of IPC and CPC classification)
- Patent GB-1859-2330 (English title: Coaxial rotor, Inventors: Henry BRIGHT)
- Patent US-1859-pl (English title: Counter rotating helicopter, Inventors: Henry BRIGHT)
- Patent US-1861-33797 (English title: Apparatus for navigating the air, Inventors: Watson F. Quinby)
- Patent US-1861-33797 (English title: Apparatus for navigating the air, Inventors: Watson F. Quinby)
- Patent FR-1865-66378 (English title: Dirigible called aerostat-helicopter-deminne, Inventors: Deminne)
- Patent GB-1867-1392 (English title: Flying machine, Inventors: William Smyth)
- Patent US-1880-PAMPHLET (English title: Helicopter, Inventors: Thomas Alvin EDISON)
- Patent DE-1879-10842 (English title: Flying machine, Inventors: Julius Griese)
- Patent US-1885-pn (English title: Helicopter, Inventors: Richard George OWEN)
- Patent ??-1885-ao (English title: Propeller plane, Inventors: Ayres)
- Patent US-1886-354413 (English title: Balloon, Inventors: Otto Hartung)
- Patent RU-1888-Raziewitsch (English title: Helicopter, Inventors: Raziewitsch)
- Patent CA-1890-34397 (English title: Flying toy, Inventors: Ernest G. Knaepfel • Louis L. Lichtfield)
- Patent HU-1895-3392 (English title: Helicopter, Inventors: Bahily János)
- Patent FR-1896-255717 (English title: Lifting propeller for aircraft, Inventors: Rudolph Kosch)
- Patent DE-1896-95963 (English title: Steerable airship without rudder, Inventors: Alexander Schörke)
- Patent US-1896-pt (English title: Man-powered helicopter, Inventors: Rudolph Kosch)
- Patent GB-1896-9129 (English title: Combined screw propeller and aeroplane, for raising, lowering, and sustaining airships, Inventors: Rudolph Kosch)
- Patent DE-1896-98109 (English title: Changeover device for flight devices, possibly a helicopter capable of landing on earth or water, Inventors: Dr. Bernhard Reinhard Beenen)
- Patent FR-1897-262832 (English title: Aviation apparatus, apparently a helicopter capable landing on water or earth, Inventors: Dr. Bernhard Reinhard Beenen)
- Patent HU-1897-9450 (English title: Steerable blimp, Inventors: Gustav Fricke)
- Patent GB-1896-3657 (English title: Aerial Machine, Inventors: James Dennis Roots)
- Patent GB-1897-9864 (English title: Flying Machines, Inventors: Dr. Bernhard Reinhard Beenen)
- Patent HU-1898-13443 (English title: Adjusting devices for aeroplanes (translation skewed by modern usage) actually a helicopter capable of landing on sea or earth, Inventors: Dr. Bernhard Reinhard Beenen)
- Patent LU-1901-4297 (English title: "Helicopter" or steerable heavier-than-air flying machine powered by propellers, Inventors: Maurice Léger)
- Patent IT-1901-58652 (English title: Helicopter, or steerable heavier-than-air flying apparatus moved by propellers, Inventors: Maurice Léger)
- Patent HU-1901-22471 (English title: Helicopter, "Steerable aircraft powered by wing screws", Inventors: Maurice Léger)
- Patent ES-1901-27364 (English title: A directable flying apparatus, heavier than air, moved by propellers "Helicopter", Inventors: Maurice Léger)
- Patent AT-1900-9694 (English title: Double screws - Propellers for flying machines, likely lift propellers, likely helicopter, Inventors: Emanuel Kalisch)
- Patent CH-1902-23691 (English title: Helicopter or airship flying aircraft heavier than air, powered by propellers, Inventors: Maurice Léger)
- Patent DE-1900-128658 (English title: "Screw wing arrangement", absolutely propellers; this may be a helicopter, Inventors: Emanuel Kalisch)
- Patent GB-1901-18862 (English title: Aeronautical machine, Inventors: Charles Tuckfield)
- Patent GB-1902-13499 (English title: Steerable Flying Machine, Inventors: Alfred K. R. A. Krakow)
- Patent GB-1901-3691 (English title: Helicopter, Inventors: Maurice Léger)
- Patent FR-1903-334526 (English title: Helicopter self-steering, with movable axes for propulsion and direction in all directions, applicable to aircraft, submarines, etc., Inventors: Joseph Monpelas de Dax)
- Patent DE-1902-139493 (English title: Dynamic flying machine (Ring flyer), Inventors: Georg Wellner)
- Patent DE-1901-141019 (English title: Flight-apparatus, Inventors: Maurice Léger)
- Patent AT-1903-12702 (English title: Helicopter "Flying apparatus", Inventors: Maurice Léger)
- Patent US-1903-727377 (English title: Flying-machine, Inventors: Otto A. Kaehler)
- Patent HU-1903-29342 (English title: Aircraft, actually quite likely a helicopter, Inventors: Antoine-Padoue Filippi)
- Patent US-1904-766021 (English title: Flying machine, Inventors: Stephen Merrill Craig)
- Patent FR-1904-349169 (English title: Apparatus for imparting movement to airplanes horizontally or vertically, Inventors: Gustav Knäpper)
- Patent RU-1905-Rebikov (English title: Helicopter, Inventors: Vassily Rebikov)
- Patent HU-1905-34770 (English title: Helicopter, Inventors: Bahily János • Marschall Antal)
- Patent DK-1905-7878 (English title: Apparatus for imparting horizontal or vertical movement to airborne objects, Inventors: Gustav Knaepper)
- Patent GB-1905-3214 (English title: Aerodromes or Flying Machines, Inventors: Edwin Richard Mumford)
- Patent GB-1905-15698 (English title: Improvements to flying machines, Inventors: Edwin Richard Mumford)
- Patent FR-1906-363081 (English title: Helicopter, Inventors: Joseph Wetzel)
- Patent CA-1906-98826 (English title: Air Ship, Inventors: Ignazio Perugini)
- Patent FR-1906-367532 (English title: Helicopter, Inventors: Georges-Pierre-Joseph Brousseau)
- Patent FR-1906-367357 (English title: Helicopter, Inventors: Henri de Lostalot)
- Patent FR-1906-369683 (English title: Helicopter, Inventors: Désiré Sival)
- Patent ES-1906-38661 (English title: A heavier-than-air aircraft, Inventors: Joseph Maes)
- Patent FR-1906-369855 (English title: Air-Ship, heavier-than-air, specifically not an airplane, an aircraft using a vertical airscrew for elevation, Inventors: Joseph Maes)
- Patent US-1907-860447 (English title: Flying machine, Inventors: William Harvey Cook)
- Patent US-1907-861740 (English title: Flying-machine, Inventors: Edward M. La Penotiere)
- Patent DE-1907-202812 (English title: Propeller screw which can be adjusted indepenently from the drive shaft, Inventors: Harry Martin Middleton)
- Patent US-1907-844172 (English title: Aeronautical machine, Inventors: Alexander MCCARTHY)
- Patent HU-1906-38048 (English title: Aircraft, Inventors: Henri de Lostalot)
- Patent FR-1907-380581 (English title: Two-propeller helicopter or airplane, Inventors: Émile Dupont)
- Patent BE-1906-12-18 Émile Dupont (English title: Two-propeller helicopter or airplane, Inventors: Émile Dupont)
- Patent FR-1907-375606 (English title: Gyroplane, Inventors: Louis Bréguet)
- Patent GB-1906-6502 (English title: Helicopter-Airplane, Inventors: Vassily Rebikov)
- Patent GB-1907-12848 (English title: Improvements to apparatus for aerial navigation, Inventors: Henri de Lostalot)
- Patent FR-1906-369683.6785 (English title: Hélicoptère, Inventors: Désiré Sival)
- Patent US-1908-892380 (English title: Flying-machine, Inventors: Edwin Richard Mumford)
- Patent FR-1908-386615 (English title: Helicopter, Inventors: Joseph Frossard)
- Patent FR-1908-389974 (English title: Flying machine, Inventors: Louis Kloos)
- Patent US-1908-875787 (English title: Flying or air car, Inventors: Selden Allen Day)
- Patent US-1908-879779 (English title: Air-ship, Inventors: Edgar F. Leeds)
- Patent US-1908-883090 (English title: Flying-machine, Inventors: Homer J CRAGUN)
- Patent US-1908-897738 (English title: Flying-machine, Inventors: Winne GORDON)
- Patent FR-1909-394254.10394 (English title: Airplane, actually helicopter or hybrid, Inventors: Jean Desbois)
- Patent FR-1908-394254 (English title: Airplane, actually helicopter or hybrid, Inventors: Jean Desbois)
- Patent FR-1907-394126 (English title: Device for airplane, actually a helicopter, Inventors: Jules Collomb)
- Patent FR-1909-393997 (English title: Helicopter, Inventors: Désiré Sival)
- Patent GB-1908-5310 (English title: Improvements in flying machines, Inventors: Joseph Chantraine)
- Patent FR-1908-387928 (English title: Aerial locomotion apparatus, Inventors: Joseph Chantraine)
- Patent FR-1908-392865 (English title: Helicopter, Inventors: Jules Puget)
- Patent US-1909-909681 (English title: Air-ship, Inventors: William Rumble)
- Patent US-1909-932712 (English title: Airship, Inventors: Enoch S Le Fevre • William David Le Fevre)
- Patent US-1909-937187 (English title: Helicopter, Inventors: Benjamin F Seymour)
- Patent US-1909-926804 (English title: Flying machine, Inventors: Lafayette J. Brown)
- Patent US-1909-910773 (English title: Flying-machine, Inventors: Heinrich Bea)
- Patent AU-1908-12779 (English title: Aeromobile, Inventors: Charles Launcelot Garland)
- Patent DE-1908-206440 (English title: Hang glider with adjustable lifting screws, Inventors: Herbert Schultze)
- Patent US-1909-942691 (English title: Gyroscopic aeroplane, Inventors: Sydney S Williams)
- Patent US-1909-910488 (English title: Aerial navigating apparatus, Inventors: John Bernard)
- Patent US-1909-914969 (English title: Aeroplane, Inventors: Henry Mueller)
- Patent US-1909-943732 (English title: Air-Ship, Inventors: Amiel Bratschie)
- Patent US-1909-937587 (English title: Aeroplane, Inventors: David S. Foster)
- Patent AT-1909-40038 (English title: Flying machine emphasizing adjustable propellers aiding both in propulsion and ascension, Inventors: Wilhelm Kress)
- Patent FR-1909-398288 (English title: Aerial helicopter, Inventors: George Alphonzo Metcalf)
- Patent US-1909-908794 (English title: Aeronautic apparatus, Inventors: George Alphonzo Metcalf)
- Patent GB-1909-12556 (English title: Flying Machines, Inventors: Thomas Augustus Dring)
- Patent GB-1909-22162 (English title: Aeromobile, Inventors: Charles Launcelot Garland)
- Patent GB-1909-24888 (English title: Aerial Machines, Inventors: Ernest Lister)
- Patent FR-1909-394254.11463 (English title: Aeroplane, actually a helicopter or hybrid, Inventors: Jean Desbois)
- Patent FR-1908-399206 (English title: Maritime and aerial lift-propeller, Inventors: Pierre-Pie Cazaux)
- Patent FR-1908-407090 (English title: Helicoplane-parachute, Inventors: Charles Wolf)
- Patent FR-1909-407090.11560 (English title: Helicoplane-parachute, Inventors: Charles Wolf)
- Patent GB-1908-13809 (English title: Improvements to aerial machines, Inventors: Christian Lorenzen)
- Patent FR-1909-380581.10732 (English title: Supplement to patent of Aug 6, 1907 for airplanes or helicopters with two propellers, Inventors: Émile Dupont)
- Patent FR-1909-401416 (English title: Equipment for combined airplane and helicopter, Inventors: Marc-Lucien-Gustave Damet)
- Patent BE-1909-219377 (English title: Concentric circular wings with contrary movements, Inventors: Alexis Beurrier)
- Patent FR-1909-400167 (English title: Monoplane helicopter with variable surface, Inventors: Michel Laplace)
- Patent FR-1909-395367 (English title: Flying machine "hélicoplane", Inventors: Dominique-Louis Barbe)
- Patent US-1910-977997 (English title: Flying-machine, Inventors: Edward BERTHOLF)
- Patent BE-1910-230691 (English title: Winged helicopter hybrid, Inventors: P. Ducastel)
- Patent FR-1910-411225 (Inventors: Felice Giuseppe Giambattista Carle Luigi GIORDANO)
- Patent AU-1909-16062 (English title: Safety aeroplane flying machine, Inventors: Edward Temple)
- Patent US-1910-970616 (English title: Flying-machine, Inventors: Thomas Alva Edison)
- Patent NZ-1910-27803 (English title: Flying Machines, Inventors: Thomas Augustus Dring)
- Patent US-1910-955049 (English title: Air-Ship, Inventors: Gustave H. Brekke)
- Patent US-1910-958747 (English title: Flying machine, Inventors: John Koskine)
- Patent FR-1910-412464 (English title: Helicopter with differential propellers, Inventors: Raymod Talmié • Achille Derazey)
- Patent FR-1910-409229 (English title: Helicopter with variable propeller inclination, Inventors: Raymond Talmié • Achille Derazey)
- Patent US-1910-978375 (English title: Flying machine, Inventors: Horace G. Hill)
- Patent MX-1910-10155 (English title: A helicopter aircraft, Inventors: Juan García Villalobos)
- Patent FR-1910-412059 (English title: Aeroplane, actually hybrid featuring adjustable propellers which aid in ascension as well as forward propulsion, Inventors: Wilhelm Kress)
- Patent HU-1909-49569 (English title: Airplane, or aircraft likely hybrid helicopter, Inventors: Antal Weczera • István Windisch)
- Patent HU-1909-47942 (English title: Flying Machine, actually a helicopter, Inventors: Frigyes Sander)
- Patent DE-1907-221458 (English title: Helicopter with movable parachute, Inventors: Otto von Krempelhuber)
- Patent US-1909-964957 (English title: Flying-machine, Inventors: Halvor Olsen Eiane)
- Patent FR-1909-420315 (English title: Aviation, Inventors: Jean-Jacques-Élie Farcot)
- Patent AU-1909-18014 (Inventors: Thomas Augustus Dring)
- Patent FR-1910-399206.12322 (English title: Maritime and aerial lift-propeller, Inventors: Pierre-Pie Cazaux)
- Patent FR-1909-407090.11558 (English title: Helicoplane-parachute, Inventors: Charles Wolf)
- Patent FR-1909-407090.11562 (English title: Helicoplane-parachute, Inventors: Charles Wolf)
- Patent FR-1909-407090.11561 (English title: Helicoplane-parachute, Inventors: Charles Wolf)
- Patent FR-1910-418866 (English title: Aerial vessel with ultra-rapid flapping and cyclonal effect by the combined use of the systems of the automatic detonator and the cyclone sprayer, Inventors: Marius Chantron)
- Patent US-1910-959266 (English title: Aerial ship, Inventors: Frederick W. Schroeder)
- Patent US-1910-979472 (English title: Flying-machine, Inventors: Fred Goehner)
- Patent US-1910-947802 (English title: Airship, Inventors: Arthur Crane)
- Patent FR-1910-415884 (English title: Aircraft, Inventors: Thomas Augustus Dring)
- Patent FR-1910-417989 (English title: Concentric biplane with contrary movements, actually a helicopter, featuring two counter-rotating blades, or sets of blades, Inventors: Édouard-Jean Bigourdan)
- Patent US-1911-996153 (English title: Aerodrome, Inventors: Guy SNOW)
- Patent GB-1910-28212 (English title: Improvements in aerial machines, Inventors: John Peter Glover)
- Patent US-1911-992726 (English title: Flying-machine, Inventors: Edwin Lyman MADDEN)
- Patent US-1911-984270 (English title: Flying-machine, Inventors: Albert Hugo Friedel)
- Patent US-1911-994417 (English title: Aerodrome, Inventors: Nathaniel L MAYHEW)
- Patent US-1911-996741 (English title: Aerial vessel, Inventors: Wesley WAIT)
- Patent US-1911-985925 (English title: Aero-traveler, Inventors: John H NOLAN)
- Patent FR-1911-426433 (English title: Helicopter, Inventors: Elisha Depoy Appley)
- Patent DK-1911-14850 (English title: Flying machine, Inventors: Thomas Augustus Dring)
- Patent US-1911-999337 (English title: Helicopter hybrid, Inventors: Vassily Rebikov)
- Patent US-1911-990015 (English title: Aeroplane, Inventors: Josef Skorupa)
- Patent US-1911-992874 (English title: Flying-machine, Inventors: Frank W JATUNN)
- Patent US-1911-995750 (English title: Airship, Inventors: Lincoln Winters • Samuel Hofsetter)
- Patent US-1911-994966 (English title: Flying-machine, Inventors: James W WOODINGTON)
- Patent US-1911-996366 (English title: Aerial-navigation machine, Inventors: Walter W. Roberts)
- Patent HU-1910-52780 (English title: Aircraft, actually a helicopter, Inventors: Ferenc Gidró)
- Patent HU-1910-52027 (English title: Rain umbrella with propeller, Inventors: Pál Kazvinczky)
- Patent HU-1910-53730 (English title: Aircraft, actually helicopter, Inventors: Thomas Augustus Dring)
- Patent HU-1910-53739 (English title: Equipment for adjusting aircraft propellers, Inventors: Wilhelm Kress)
- Patent FR-1909-420315.14594 (English title: Aviation, Inventors: Jean-Jacques-Élie Farcot)
- Patent US-1911-989490 (English title: Aerial apparatus of the heavier-than-air class, Inventors: John J. DONNELLY)
- Patent FR-1910-424499 (English title: Propulsion-lift propeller for airplanes, Inventors: Émile Lallouette)
- Patent FR-1911-429645 (English title: Improvements to aeroplanes, actually an airplane-helicopter hybrid, Inventors: Alvaro Da Cunha)
- Patent US-1911-1009048 (English title: Aerodrome, Inventors: Peter Pitcairn Carmichael)
- Patent FR-1911-417989.14395 (English title: Concentric biplane with contrary movements, actually a helicopter, featuring two counter-rotating blades, or sets of blades, Inventors: Édouard-Jean Bigourdan)
- Patent FR-1910-417989.13504 (English title: Concentric biplane with contrary movements, actually a helicopter, featuring two counter-rotating blades, or sets of blades, Inventors: Édouard-Jean Bigourdan)
- Patent GB-1911-13607 (English title: Improvements in flying machines, Inventors: William Radford)
- Patent GB-1910-17653 (English title: Improvements in the methods of controlling the flight of helicopters, Inventors: Michael Holroyd Smith)
- Patent FR-1910-429307 (English title: Improvements in airplanes, actually a helicopter-hybrid, Inventors: Joseph Boisseau)
- Patent FR-1911-434401 (English title: Improvements in airplanes, actually improvements applicable to the helicopter-hybrid described in an earlier patent, Inventors: Joseph Boisseau)
- Patent US-1910-999560 (English title: Flying-machine, Inventors: Armin Helfer)
- Patent GB-1910-20786 (English title: Improvements in Aerial Vessels, Inventors: William Everett Sylveste Coyne)
- Patent US-1911-991794 (English title: Flying-machine or airship, Inventors: Daniel P. McLaughlin)
- Patent GB-1911-5162 (English title: Flying Machines, Inventors: Thomas Augustus Dring)
- Patent FR-1911-448295 (English title: Helicopter aeroplane, Inventors: Édouard Louis Huber)
- Patent US-1912-1028891 (English title: Airship, Inventors: William David Le Fevre)
- Patent FR-1912-439296 (English title: Helicopter propeller, Inventors: Constant Crouzat)
- Patent GB-1911-22789 (English title: Helicopter, Inventors: Albert Valentine)
- Patent US-1912-1014643 (English title: Aerial vessel, Inventors: John J DONNELLY)
- Patent US-1912-1034429 (English title: Flying-machine, Inventors: Thomas Augustus Dring)
- Patent CH-1912-59557 (English title: Superimposed propellers rotating in opposite directions, avoiding uneven strain, suitable (directly) for lift as well as propulsion, Inventors: Karl Pollacsek)
- Patent DE-1909-247221 (English title: Hang glider with lifting screw, Inventors: Gustav Mees)
- Patent US-1912-1015656 (English title: Flying machine, Inventors: Albert Valentine)
- Patent US-1912-1013523 (English title: Airship, Inventors: Frank G. Vohs)
- Patent FR-1912-446544 (English title: Aeroplane helicoplane, Inventors: Pascal Frère)
- Patent HU-1911-57780 (English title: Lifting screw flying machine structure air-screw?, Inventors: Sándor Helyes)
- Patent HU-1910-55408 (English title: Flying machine, helicopter with two longitudinally separated lift propellers, Inventors: Ágost Ernő Müller)
- Patent HU-1910-56402 (English title: Innovations on flying machines, Inventors: Ignác Lampl)
- Patent AU-1912-4103 (English title: Flying machines, Inventors: Thomas Augustus Dring)
- Patent AU-1912-4350 (English title: Vertically ascending flying machines, Inventors: Kurt Schultze)
- Patent DE-1910-247715 (English title: Propeller blade for helicopters, arranged to function as airfoils when the propulsion system is oriented toward horizontal movement, Inventors: Otto Schmidt)
- Patent GB-1912-5459 (English title: Improvements in or relating to Aerial Machines, Inventors: Jacob Ellehammer • Niels Waltersen Aasen)
- Patent FR-1912-415884.15536 (English title: Aircraft, Inventors: Thomas Augustus Dring)
- Patent FR-1912-424499.15387 (English title: Propulsion-lift propeller for airplanes, Inventors: Émile Lallouette)
- Patent FR-1912-429645.15915 (English title: Improvements in airplanes, actually an airplane-helicopter hybrid, Inventors: Alvaro Da Cunha)
- Patent GB-1912-13180 (English title: Improvements in Aerial Machines, Inventors: Peter Pitcairn Carmichael)
- Patent FR-1912-449486 (English title: Aerial vehicle, Inventors: Édouard-Jean Bigourdan • Alexis Beurrier)
- Patent GB-1911-14926 (English title: Improvements relating to Helicopter Flying-machines, Inventors: Édouard-Jean Bigourdan)
- Patent US-1912-1034430 (English title: Flying-machine, Inventors: Thomas Augustus Dring)
- Patent FR-1912-439343 (English title: Improvements to hydro-aeroplanes and similar devices, VTOL as well, helicopter, hybrid, Inventors: Gustav Mees)
- Patent FR-1912-439989 (English title: Improvements to the means for mounting propellers, and more specifically ascending propellers with variable pitch, on aircraft, Inventors: Gustav Mees)
- Patent FR-1912-441314 (English title: Improvements to propellers, and especially to overhead propellers, with changeable tilt blades, Inventors: Gustav Mees)
- Patent FR-1911-440593 (English title: Process for ensuring the lift and propulsion of bodies immersed in a fluid, Inventors: Alphonse Papin • Didier Rouilly)
- Patent FR-1911-440594 (English title: Helicopter, Inventors: Alphonse Papin • Didier Rouilly)
- Patent GB-1912-3110 (English title: Improvements in vertically ascending flying machines, Inventors: Kurt Schultze)
- Patent US-1913-1065263 (English title: Aeroplane steering and stabilizing mechanism, Inventors: Gustav Mees)
- Patent US-1913-1052378 (English title: Flying-machine, Inventors: Edgar Eugene Porter)
- Patent GB-1912-17933 (English title: Pyramidal helicopter, Inventors: Travers Glynn Ivon Ayers)
- Patent GB-1913-16621 (English title: Superimposed propellers rotating in opposite directions, avoiding uneven strain, suitable (directly) for lift as well as propulsion, Inventors: Karl Pollacsek)
- Patent US-1913-1049927 (English title: Flying-machine, Inventors: Edward L. SIEG)
- Patent FR-1913-460847 (English title: Air navigation equipment on pyramidal helicopter, Inventors: Travers Glynn Ivon Ayers)
- Patent US-1913-1054798 (English title: Dirigible flying-machine, Inventors: Benjamin F. Seymour, Jr.)
- Patent US-1913-1052986 (English title: Flying-machine, Inventors: Joseph L. TUCKER)
- Patent US-1913-1050980 (English title: Aerodrome, Inventors: Samuel D. MOTT)
- Patent US-1913-1050980 (English title: Aerodrome, Inventors: Samuel D. MOTT)
- Patent HU-1912-61202 (English title: Vertically ascending aircraft, Inventors: Kurt Schultze)
- Patent US-1913-1050921 (English title: Airship, Inventors: James Darche)
- Patent FR-1912-450466.18100 (English title: Helicopter, or more properly a gyroscope preventing the nacelle from rotating with the propellers, Inventors: Armand-Jean-Auguste Deperdussin)
- Patent FR-1912-450466 (English title: Helicopter, actually constituted of multiple airplanes, Inventors: Armand-Jean-Auguste Deperdussin)
- Patent US-1912-1061870 (English title: Flying-machine, Inventors: Vincente Lenoard Rodriguez)
- Patent GB-1912-13882 (English title: Improvements relating to Helicopter Flying Machines, Inventors: Édouard Jean Bigourdan)
- Patent US-1913-1050654 (English title: Flying-machine, Inventors: John P. Holland)
- Patent DE-1912-267069 (English title: Sailing wheel for aircraft with disks rotating at an angle to one another and panels of fabric attached to them, Inventors: Kurt Schultze)
- Patent FR-1913-459262 (English title: Flying machine that can rise vertically, Inventors: Alexei Schidkoff)
- Patent GB-1912-10633 (English title: Improvements in Helicopters, Inventors: Alphonse Papin • Didier Rouilly)
- Patent AT-1912-63082 (English title: Screw flyer, Inventors: Alphonse Papin • Didier Rouilly)
- Patent US-1914-1091315 (English title: Airship, Inventors: David F Felten)
- Patent FR-1914-464462 (English title: Radial tail for ascension propellers, Inventors: Camille Lacoste)
- Patent FR-1914-464461 (English title: Aerial lift blades with shell, Inventors: Camille Lacoste)
- Patent FR-1914-464794 (English title: Single-propeller helicopter, Inventors: Camille Lacoste)
- Patent FR-1915-477552 (English title: Improvement to aircraft of the helicopter type, Inventors: Maxime PHILIPPON)
- Patent US-1915-1160473 (English title: Flying-machine, Inventors: Edward WARNER)
- Patent HU-1914-68447 (English title: Helicoplane, Inventors: Kálmán Fekete)
- Patent FR-1915-475610 (English title: Helicopter with a single lift blade)
- Patent GB-1914-12574 (English title: Improvements in and relating to Aerial Machines, actually a range of applied observations aerodynamically pertinent to blades or wings, Inventors: Isaac Bell)
- Patent GB-1914-4543 (English title: Improvements in and relating to Aerial Machines and Aerial Driven Watercraft, actually an elaborately pivoting propeller, Inventors: Isaac Bell)
- Patent AT-1912-67896 (English title: Flying machine with folding fabric-covered sail-wheels, Inventors: Kurt Schultze)
- Patent US-1912-1133660 (English title: Helicopter, Inventors: Alphonse Papin • Didier Rouilly)
- Patent BE-1916-275531 (English title: Airship which is heavier-than-air, HELICOPTER, Inventors: C.-L. Carrels)
- Patent FR-1916-481332 (English title: Helicopter-Plane (?), Inventors: Lyoubomir Boïovitch)
- Patent US-1916-1186650 (English title: Flying-machine, Inventors: Joseph T. Crow)
- Patent GB-1917-113371 (English title: Helicopter on aeroplane, Inventors: Alfred William Turner • Walter Fisher Luff)
- Patent CA-1917-177665 (English title: Dirigible airship, Inventors: Eddy L. Eddy)
- Patent US-1913-1230443 (English title: Aircraft, Inventors: John P. Tarbox)
- Patent US-1916-1237318 (English title: Airship, Inventors: John Flink)
- Patent US-1918-1264712 (English title: Lifting propellers, Inventors: Howard P Tweed)
- Patent US-1918-1287076 (English title: Flying machine, Inventors: Samuel Moses)
- Patent GB-1916-281735 (English title: Improvements relating to aerial navigation, Inventors: Louis Brennan)
- Patent US-1918-1285479 (Inventors: Andreas Marius Van Bezooyen)
- Patent GB-1918-128724 (English title: Improvements to aeroplanes, Inventors: Louis Raymond Accornero • Adolphe Gaydon)
- Patent FR-1919-494660 (English title: Flying machine (helicopter), Inventors: Theophile-Ascague Leleu)
- Patent GB-1918-127418 (English title: Improvements in Aerial Lifting Devices, Inventors: Cornelis Hendrik van Asperen)
- Patent GB-1918-122164 (English title: Improvements in and relating to Air-craft of the Helicopter Type, Inventors: Pieter Barteld Van Leggelo)
- Patent FR-1916-502520.22245 (English title: Rotary wing aircraft, Inventors: Alexis Beurrier • Edmond Bigourdan • Louis Lacoin)
- Patent US-1917-1350982 (English title: Flying-machine with revolving wings, Inventors: Alexis Beurrier • Édouard-Jean Bigourdan • Louis Lacoin)
- Patent FR-1915-502520 (English title: Improvements in Flying Machines with Revolving Wings, Inventors: Alexis Beurrier • Edmond Bigourdan • Louis Lacoin)
- Patent FR-1921-523791 (English title: Improvements to helicopters, Inventors: Marius Latour)
- Patent FR-1916-521764 (English title: Improvements to aircraft which are heavier-than-air, actually an airplane-helicopter hybrid)
- Patent US-1921-1366016 (English title: Aeroplane-propeller, Inventors: Arthur A. Mosher)
- Patent CH-1914-95181 (English title: Helicopter with one single lift propeller, Inventors: Société Anonyme des Établissements Nieuport)
- Patent US-1918-1435190 (English title: Direct-ascent flying machine, Inventors: Pieter Barteld Van Leggelo)
- Patent US-1923-1472148 (English title: Helicopter, Inventors: Emile Berliner)
- Patent US-1923-1454944 (English title: Helicopter propeller system, Inventors: Raul Pateras Pescara)
- Patent BE-1926-338559 (English title: Helicopter with two lift propellers, Inventors: Nicolas Florine)
- Patent US-1928-1655114 (English title: Apparatus for Aerial Transportation, Inventors: Nikola Tesla)
- Patent US-1929-1775861 (English title: Flying machine, Inventors: George Lehberger)