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Patents > Filing date: 1904 & Citations from after 1930: None & Number of text pages: 3-4

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Propulsion (13) · navigation (12) · LTA (12) · airplane (10) · frame (10) · stability (7) · rudder (6) · None (5) · propellers (5) · balloon (4) · construction (3) · whole (3) · propeller (3) · hybrid (3) · Design (3) · lift (3) · airfoil (3)
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