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Patents > Inventor country: DE & Publication date: 1913 & Number of text pages: 1-2

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airplane (22) · frame (17) · design (13) · LTA (11) · subsystem (10) · airship (8) · construction (8) · Propulsion (7) · wings (6) · propellers (5) · stability (5) · suspension (4) · Aerodynamics (4) · flapping (4)
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