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Patents > Office : ?? or DE & CPCs : CPC A63H27/08 or CPC B64B1/00 & Number of diagram pages: 1

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LTA (17) · airship (7) · navigation (5) · frame (5) · balloon (5) · kite (5) · design (5) · propeller (4) · car (4) · propulsion (4) · dirigible (4) · whole (3) · aerodynamics (3) · control (3) · rigid (3)
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