Drilldown: Patents

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Patents > National tech categories : DE 77 or USPC 244/13 or USPC 244/45R & IPCs : IPC B64B1/40 or IPC B64C39/00

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frame (8) · stability (8) · airplane (7) · LTA (6) · propeller (5) · navigation (5) · car (4) · propulsion (4) · None (4) · airfoil (4) · wheels (4) · construction (3) · control (3) · balloon (3) · takeoff (3)
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Showing below up to 32 results in range #1 to #32.

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