Drilldown: Patents

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Patents > National tech categories : DE 77h or USPC 244/226 & First filing: None

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LTA (12) · subsystem (11) · propeller (5) · whole (5) · balloon (5) · frame (5) · None (4) · navigation (4) · car (4) · gas (4) · flapping (4) · safety (4) · propulsion (4) · hybrid (3) · parachute (3) · stability (3) · electricity (3) · design (3) · toy (3)
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Showing below up to 41 results in range #1 to #41.

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