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Patents > Year granted: 1920 & Office: HU & Number of diagram pages: 1-3

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airplane (15) · motors (8) · construction (7) · design (7) · Aerodynamics (6) · Airship (5) · propellers (5) · projectile (4) · military (4) · subsystem (4) · Frame (4) · Biplane (3) · wings (3) · propulsion (3)
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Showing below up to 37 results in range #1 to #37.

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