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Patents > Inventor country: CH & Filing date: 1900 - 1999 & Number of text pages: 2

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frame (14) · LTA (14) · airplane (10) · subsystem (10) · construction (7) · propeller (7) · None (6) · navigation (6) · propulsion (5) · rigid (4) · gas (4) · stability (4) · Wings (4) · design (4) · flapping (3) · control (3) · pressure (3)
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