Drilldown: Patents

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Patents > Year filed: 1916 & Office : AT or DE & Number of diagram pages: 1

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frame (8) · airplane (7) · LTA (6) · propeller (6) · propulsion (6) · biplane (5) · military (5) · subsystem (5) · engine (5) · design (4) · construction (4) · projectile (3) · electricity (3) · propellers (3) · Rigid (3) · None (3)
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