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Patents > Inventor country : DE or RU & National tech categories : BE K or DE 77h or FR 6.4 & Family year: 1909

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Tech fields:
LTA (18) · airplane (18) · design (13) · Propellers (12) · frame (11) · Propulsion (10) · stability (9) · takeoff (7) · hybrid (7) · wings (6) · lift (6) · whole (6) · propeller (5) · gyroscope (5) · balloons (4) · control (4) · aerodynamics (4) · aerostat (4)
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CPCs:
CPC B64C23/005 (7) · CPC B64B1/00 (7) · CPC B64B1/58 (6) · CPC B64B1/62 (4) · CPC B64C2700/6274 (3) · CPC B64C33/02 (3) · CPC B64C2700/6295 (3) · CPC B64C3/54 (3) · CPC B64C39/00 (3) · CPC B64C2700/6218 (2) · CPC B64C11/006 (2) · CPC B64B1/40 (2) · CPC B64C11/20 (2) · CPC B64C2700/6246 (2) · CPC B64C17/00 (2) · CPC B64C3/385 (2)
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Showing below up to 57 results in range #1 to #57.

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