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Patents > Inventor country: US & Applicant person: None & Grant date: 1909

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airplane (8) · frame (7) · navigation (6) · stability (6) · LTA (5) · propeller (5) · takeoff (4) · helicopter (3) · propulsion (3) · safety (3) · landing (2) · hybrid (2) · electronics (2) · Drachenflieger (2) · car (2)
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