Drilldown: Patents

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Patents > Year granted: 1910 - 1919 & Citations from after 1930: 4-30 & Number of claims: 4-6

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Tech fields:
propeller (6) · None (6) · airplane (3) · Kite (3) · frame (3) · Windmill (2) · wheels (2) · aerial propeller (2) · ballistics (2)
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CPC A63H27/08 (2) · CPC Y02E10/74 (2) · CPC B64C25/60 (2) · CPC B64C11/343 (2)
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