Drilldown: Patents

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Patents > Grant date: 1920 - 1929 & Related to aircraft: yes & National tech categories: FR 6.4

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Tech fields:
airplane (31) · design (24) · frame (12) · wings (11) · Construction (11) · aerodynamics (8) · propellers (8) · chassis (5) · Control (5) · heavier-than-air (4) · motors (4) · ascension (4) · Subsystem (4) · propulsion (4)
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None (5)
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CPCs:
CPC B64C3/00 (8) · CPC B64C23/005 (5) · CPC B64C2700/6233 (4) · CPC B64C2700/6274 (4) · CPC B64C17/00 (4) · CPC B64C13/00 (4) · CPC B64C3/18 (3) · CPC B64C11/14 (2) · CPC B64C25/36 (2) · CPC B64C3/54 (2) · CPC B64C2700/6218 (2)
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