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Patents > National tech categories : BE K or DE 77h.6 & Number of figures: 1-4

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None (10) · Christian Lorenzen (6) · Jakob Haw (6) · Hellmuth Hirth (3) · Lucien Chauvière (2) · Joseph Hofmann (2) · Fidia Riccardo Pio (2)
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propeller (37) · Propulsion (10) · propellers (10) · None (9) · airplane (9) · subsystem (5) · hybrid (4) · helicopter (3) · parachute (3) · metal (3) · wing (2) · stability (2) · marine (2) · LTA (2) · wood (2) · electricity (2) · design (2) · aerodynamics (2) · barometer (2)
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Showing below up to 67 results in range #1 to #67.

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