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Patents > Filing date: 1919 & Application number: None & Number of text pages: 1-4

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airplane (12) · propellers (8) · subsystem (6) · frame (5) · propeller (5) · propulsion (4) · design (4) · aerial propeller (4) · marine (3) · car (3) · Aerodynamics (3) · compartments (2) · control (2) · automatic stability (2) · stability (2) · Instrument (2) · hélice (2) · Wings (2)
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None (8) · CPC B63H1/26 (3) · CPC B64C11/04 (2) · CPC B64C11/343 (2) · CPC B64C11/00 (2) · CPC B64C11/18 (2) · CPC B64C3/00 (2)
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