Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & Inventor country : FR or GB or HU or NL & Applicant type : COMPANY or COMPANY + INDIV or INDIV or UNIV-PRO-GOV & Number of claims: 3-4

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Tech fields:
airplane (10) · wings (7) · frame (7) · Design (5) · fuselage (5) · construction (4) · propellers (4) · helicopter (3) · propulsion (3) · Control (3) · metal (3)
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CPCs:
None (4) · CPC B64C3/54 (2) · CPC B64D27/00 (2) · CPC B64C3/26 (2)
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