Drilldown: Patents

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Patents > National tech categories: GB 4 & First filing : No or None & Number of claims: None

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propulsion (9) · LTA (7) · propeller (5) · frame (5) · navigation (3) · hybrid (3) · balloon (3) · rubber (3) · parachute (3) · flapping (3) · springs (2) · rudder (2) · metal (2) · marine (2) · wings (2) · gas (2)
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