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Patents > National tech categories: USPC 244/100R & First filing : No or Yes

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airplane (12) · None (9) · landing (9) · frame (9) · navigation (7) · wheels (6) · takeoff (4) · stability (4) · rudder (4) · helicopter (3) · propeller (3) · shock-absorbers (3) · car (3)
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Showing below up to 35 results in range #1 to #35.

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