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Patents > Grant date: 1910 - 1919 & IPCs : IPC B64B1/62 or IPC B64C31/06 & Citations from after 1930: None

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LTA (29) · kite (11) · gas (9) · Lift (5) · navigation (5) · frame (5) · propellers (5) · propulsion (5) · construction (4) · balloon (4) · balloons (4) · stability (4) · kites (3) · hybrid (3) · Design (3) · Dirigibles (3) · airship (3) · ballonet (3)
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