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Patents > Year granted: 1920 - 1929 & Related to aircraft : Yes or marine & National tech categories : FR 6.4 or USPC 244/233

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airplane (30) · Design (24) · frame (11) · wings (11) · construction (11) · Aerodynamics (9) · Propellers (9) · control (6) · propulsion (5) · chassis (5) · ascension (4) · subsystem (4) · motors (4) · Stability (4)
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CPC B64C3/00 (8) · CPC B64C23/005 (5) · CPC B64C2700/6233 (4) · CPC B64C13/00 (4) · CPC B64C17/00 (4) · CPC B64C2700/6274 (4) · CPC B64C3/18 (3) · CPC B64C3/54 (2) · CPC B64C2700/6218 (2) · CPC B64C11/14 (2) · CPC B64C25/36 (2)
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Showing below up to 51 results in range #1 to #51.

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