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Patents > National tech categories : DE 77h or DE 77h.6 & IPCs : IPC B64C3/18 or IPC B64C39/00 or None

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None (10) · Emil Lehmann (3) · Christian Lorenzen (3) · Caspar Braun (3) · August Euler (2) · Paul Frederik Degn (2) · Joseph Hofmann (2) · Heinrich Suter (2) · François Hennebique (2) · August Riedinger (2) · Hellmuth Hirth (2) · Albert Geisler (2)
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Tech fields:
propeller (29) · propulsion (16) · frame (13) · LTA (13) · subsystem (12) · None (10) · whole (8) · navigation (8) · balloon (7) · stability (6) · safety (6) · wings (6) · airplane (6) · electricity (5) · design (5) · kite (5)
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Showing below up to 97 results in range #1 to #97.

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