Drilldown: Patents

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Patents > Year filed: 1914 & National tech categories : HU V/h or USPC 244/90R

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airplane (23) · frame (7) · stability (6) · Wheels (6) · construction (5) · Wings (5) · Chassis (5) · airship (4) · Design (4) · biplane (4) · aerodynamics (3) · lift (3)
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