Drilldown: Patents

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Patents > Year filed: 1890 - 1899 & Office : CH or DE or MX & Number of text pages: 3-4

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LTA (14) · propulsion (10) · balloon (8) · frame (7) · navigation (6) · None (5) · design (4) · car (3) · propeller (3) · dirigible (3) · wheels (2) · takeoff (2) · stability (2) · gas (2) · kite (2) · flapping (2) · compartments (2)
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