Drilldown: Patents

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Patents > Year filed: 1880 - 1889 & Applicant firm: None & Number of text pages: 4-50000000

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LTA (20) · navigation (18) · propeller (10) · frame (9) · propulsion (9) · balloon (9) · car (8) · rudder (6) · cargo (5) · stability (4) · safety (4) · passenger (4) · flapping (4) · hybrid (3) · compartments (3)
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