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Patents > Filing date: June 1909 & Granted: Yes & Number of figures: 2-3

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LTA (13) · airship (9) · propulsion (9) · frame (7) · Propellers (7) · balloon (6) · airplane (6) · design (6) · lift (4) · Balloons (3) · control (3) · Aerostat (3) · Compartments (3)
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