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Patents > Filing date: 1917 & Application number: None & Publication date: 1920 - 1929

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Airplane (10) · None (8) · propeller (5) · subsystem (4) · aerodynamics (4) · Frame (4) · Instrument (4) · military (3) · design (3) · propellers (3) · Illumination (3) · Altitude (3) · Bombing (3) · wings (3) · airship (3)
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