Drilldown: Patents

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Patents > CPCs : CPC A63B71/0672 or CPC B64C2700/6256 or CPC B64C33/02 or CPC B64C39/00 & Family year: 1800 - 1899

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flapping (7) · propulsion (6) · LTA (6) · None (6) · ornithopter (4) · airship (4) · landing (3) · mechanical (2) · glider (2) · airfoil (2) · Indicators (2) · navigation (2) · frame (2) · marine (2) · car (2)
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