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Patents > Office: GB & Grant date: 1904

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propeller (5) · propulsion (5) · LTA (4) · navigation (3) · airplane (3) · frame (3) · wings (2) · hybrid (2) · flapping (2) · experiment (2) · construction (2) · ballonet (2) · balloon (2) · whirling arm (2) · airfoil (2)
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