Drilldown: Patents

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Patents > Year filed: 1910 - 1919 & IPCs: IPC B64C33/02 & Number of text pages: 3-4

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wings (8) · flapping (8) · ornithopter (7) · Design (6) · hybrid (4) · frame (4) · None (4) · airplane (4) · construction (4) · HTA (3) · navigation (3) · propellers (2) · stability (2) · Lift (2) · control (2) · chassis (2) · whole (2) · propulsion (2)
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