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Patents > Applicant person : Gustav Mees or Hermann Ruthenberg

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propellers (14) · airplane (12) · hybrid (11) · design (9) · stability (9) · None (8) · frame (8) · gyroscope (8) · propeller (6) · helicopter (6) · takeoff (5) · propulsion (5) · airship (4) · LTA (4) · construction (4) · control (4) · hydroplane (4)
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Showing below up to 41 results in range #1 to #41.

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