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Patents > Grant date: 1911 & National tech categories : HU V/h or USPC 244/15

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airplane (18) · design (17) · Subsystem (17) · Propellers (16) · Whole (14) · Propulsion (10) · Construction (7) · stability (6) · Frame (6) · wings (5) · lift (4) · Airship (4) · Ascension (4) · Helicopter (4) · Aerodynamics (3) · automatic stability (3) · Sustentation (3)
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Showing below up to 41 results in range #1 to #41.

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