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Patents > Patent agent: Herbert Haddan & Co. & Number of claims: 4-20 & Number of diagram pages: 1-2

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navigation (5) · control (5) · Frame (3) · propulsion (3) · Design (3) · rudder (3) · Airplane (3) · construction (2) · LTA (2) · propellers (2) · subsystem (2) · takeoff (2) · balloon (2) · ballonet (2) · stability (2) · wings (2)
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