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Patents > National tech categories : DE 77h.6 or GB 4 propel & steer & Number of claims: 4-13

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propulsion (11) · propeller (11) · navigation (6) · frame (5) · stability (4) · LTA (3) · subsystem (3) · heavier-than-air (3) · electricity (3) · flapping (2) · steam (2) · rudder (2) · marine (2) · glider (2) · wings (2) · balloon (2) · design (2) · car (2) · aluminum (2)
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Showing below up to 24 results in range #1 to #24.

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