Drilldown: Patents

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Patents > Year filed: 1912 & IPCs : IPC B64C11/00 or IPC CPC B64C13/00

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propulsion (15) · Propellers (6) · design (6) · airplane (6) · Aerodynamics (5) · navigation (4) · stability (3) · helicopter (3) · construction (3) · wings (3) · frame (3) · Subsystem (3) · aerial propeller (3) · airship (2) · marine (2) · propeller (2) · automatic stability (2)
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Showing below up to 32 results in range #1 to #32.

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