Drilldown: Patents

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Patents > National tech categories : DE 77h.6 or USPC 244/233 & Number of claims: 5-30000000

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None (9) · airplane (9) · propulsion (5) · propeller (4) · navigation (4) · frame (4) · control (3) · stability (3) · rudder (3) · propellers (3) · design (3) · electricity (2) · wings (2) · biplane (2) · automatic stability (2)
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Showing below up to 28 results in range #1 to #28.

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