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Patents > Year granted: 1909 & Applicant firm: None & Grant date: July 1909 & Family year: 1908

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airplane (8) · propulsion (7) · LTA (6) · navigation (6) · stability (5) · Aerodynamics (5) · Design (4) · subsystem (4) · control (3) · None (2) · airship (2) · hybrid (2) · safety (2) · propeller (2) · ornithopter (2)
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Showing below up to 27 results in range #1 to #27.

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