Drilldown: Patents

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Patents > Year granted: 1920 & Office: HU & Citations from after 1930: None

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Airplane (16) · Motors (8) · design (7) · construction (7) · propellers (6) · aerodynamics (6) · airship (5) · subsystem (4) · Frame (4) · projectile (4) · military (4) · wings (3) · propulsion (3) · biplane (3)
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Showing below up to 39 results in range #1 to #39.

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