Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & IPCs : IPC B64B1/62 or IPC B64C11/00 or IPC B64C13/00

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None (10) · airplane (9) · control (8) · design (7) · steering (6) · propellers (5) · frame (5) · aerodynamics (5) · propulsion (4) · airship (3) · rudder (3) · subsystem (3) · Construction (3)
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Showing below up to 44 results in range #1 to #44.

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