CPC B64C27/28
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CPC B64C27/28 is a patent class for xyz.[1][2]
References
This wiki has 10 patents in category "CPC B64C27/28".
Patents in category CPC B64C27/28
- Patent FR-1902-328197 (English title: Balanced propellers, Inventors: Adrien Baudin, Filing date: 1902-12-31)
- Patent FR-1908-389974 (English title: Flying machine, Inventors: Louis Kloos, Filing date: 1908-05-07)
- Patent GB-1909-205 (English title: Improvements in Aeronautic Apparatus, Inventors: George Alphonzo Metcalf, Filing date: 1909-01-04)
- Patent GB-1909-10467 (English title: Improvements in Flying Machines, Inventors: Heinrich Riedel, Filing date: 1909-05-03)
- Patent GB-1910-17653 (English title: Improvements in the methods of controlling the flight of helicopters, Inventors: Michael Holroyd Smith, Filing date: 1910-07-25, Applicant firm: Philaerian Ltd.)
- Patent GB-1910-22401 (English title: Pivotable propellers for lift and propulsion, Inventors: Elisha Depoy Appley, Filing date: 1910-09-27)
- Patent GB-1912-5459 (English title: Improvements in or relating to Aerial Machines, Inventors: Jacob Christian Hansen-Ellehammer • Niels Waltersen Aasen, Filing date: 1912-03-04)
- Patent US-1918-1435190 (English title: Direct-ascent flying machine, Inventors: Pieter Barteld Van Leggelo, Filing date: 1918-01-05)
- Patent FR-1919-496275 (Inventors: Pieter Barteld Van Leggelo, Filing date: 1918-03-02)
- Patent GB-1918-122164 (English title: Improvements in and relating to Air-craft of the Helicopter Type, Inventors: Pieter Barteld Van Leggelo, Supplementary to patent: Patent US-1918-1435190, Filing date: 1918-04-03)
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