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Patents > National tech categories : DE 77h.6 or GB 4 propelling & Number of diagram pages: 1

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None (10) · Christian Lorenzen (7) · Jakob Haw (7) · Hellmuth Hirth (4) · Erhard Brunsmann (2) · Joseph Hofmann (2) · Paul Frederik Degn (2) · Lucien Chauvière (2)
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propeller (46) · propulsion (15) · subsystem (8) · propellers (8) · Airplane (4) · helicopter (4) · None (3) · design (3) · stability (3) · marine (3) · metal (3)
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