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Patents > National tech categories : DE 77 or USPC 244/110F & Number of figures: 4-5

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LTA (14) · None (11) · propulsion (9) · navigation (7) · propeller (5) · kite (4) · frame (4) · balloon (3) · dirigible (3) · piloting (3) · airship (3) · ornithopter (3) · car (3) · control (2) · stability (2) · electricity (2) · captive (2) · hydrogen (2)
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Showing below up to 41 results in range #1 to #41.

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