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Patents > Year filed: 1912 & Office : AU or BE or DEG

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airplane (16) · propulsion (8) · wings (6) · stability (5) · design (5) · control (4) · takeoff (4) · propellers (4) · navigation (4) · hydroplane (4) · hybrid (4) · helicopter (4) · aerodynamics (4) · construction (3) · marine (3) · LTA (3) · frame (3) · landing (3) · steering (3)
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Showing below up to 33 results in range #1 to #33.

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