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Patents > Office: US & Grant date: November 1911

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BORKENHAGEN FRANCIS E (2)
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None (18) · frame (5) · airplane (4) · stability (4) · propeller (4) · rudder (3) · propulsion (3) · navigation (3) · subsystem (2) · HTA (2) · landing (2) · wings (2) · equilibrium (2) · design (2) · control (2)
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Showing below up to 39 results in range #1 to #39.

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