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Patents > Year granted: 1914 & National tech categories : DE 77h.5 or HU V/h & IPCs: None

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airplane (24) · stability (15) · automatic stability (9) · Design (7) · equilibrium (5) · Propellers (5) · wheels (5) · Frame (5) · Aerodynamics (4) · Construction (4) · airship (4) · landing (3) · Piloting (3) · chassis (3)
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Showing below up to 43 results in range #1 to #43.

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