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Patents > Year granted: 1913 & IPCs: None & Number of text pages: 4-50000000

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Inventors:
None (2) · De Bert Hartley (2) · Adolphe-François-Joseph Doutre (2) · Jan Jaakson (2) · Alexander Albert Holle (2) · Edmund Sparmann (2) · Lewis Ginter Young (2) · Frank M. Bell (2)
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Applicant person:
None (9) · Edmund Sparmann (2) · Frank Merrill Bell (2) · De Bert Hartley (2) · Jan Jaakson (2) · Adolphe-François-Joseph Doutre (2)
Applicant is inventor:
Tech fields:
airplane (34) · stability (20) · frame (18) · None (13) · design (13) · propulsion (10) · propellers (9) · Wings (9) · automatic stability (9) · rudder (8) · propeller (7) · control (6) · aerodynamics (6) · Whole (6) · biplane (6)
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None (22)
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National tech categories:
HU V/h (16) · None (10) · USPC 244/80 (4) · CH 129b (3) · AT 77d (3) · USPC 244/90R (2) · USPC 416/129 (2) · FR 6.4 (2) · USPC 244/79 (2) · USPC 244/233 (2) · USPC 244/45R (2)
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