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Patents > Year granted: 1919 & Inventor country : CA or DE

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airplane (24) · airship (16) · frame (16) · construction (13) · LTA (13) · None (10) · design (10) · propulsion (9) · Subsystem (8) · instrument (7) · Gas (6) · wings (6) · fuselage (6) · propellers (6) · control (5) · military (5) · navigation (5) · cooling (5) · safety (5)
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