Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & First filing: Yes & Number of figures: 7

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Tech fields:
airplane (8) · None (5) · Control (5) · construction (4) · propeller (3) · Fuselage (3) · frame (3) · wings (3) · helicopter (2) · material (2) · structure (2) · ascension (2) · propellers (2) · Descent (2) · design (2) · Landing gear (2) · Equilibrium (2) · aerial propeller (2)
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Related to aircraft:
CPCs:
CPC B64C3/00 (3) · CPC B64C2700/6233 (2) · CPC B64C3/18 (2) · CPC B64C13/24 (2) · CPC B64F2700/6226 (2)
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Citations from after 1930:
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