Drilldown: Patents

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Patents > Inventor location: None & National tech categories : DE 77h.6 or USPC 74/471XY

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Inventors:
None (14) · Jakob Haw (7) · Christian Lorenzen (6) · Hellmuth Hirth (4) · Lucien Chauvière (2) · Paul Frederik Degn (2) · Joseph Hofmann (2)
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Tech fields:
propeller (48) · propulsion (15) · Propellers (9) · subsystem (5) · Airplane (5) · None (3) · helicopter (3) · parachute (3) · metal (3) · marine (3)
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