Drilldown: Patents

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Patents > Year granted: 1922 & Number of figures: 2-5

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propellers (8) · airplane (7) · LTA (7) · None (6) · propeller (6) · propulsion (5) · design (5) · subsystem (4) · safety (4) · frame (3) · control (3) · military (3) · aerodynamics (3) · Rigid (2) · Airship (2) · aileron (2) · piloting (2) · Gas (2) · ornithopter (2)
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