Drilldown: Patents

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Patents > Grant date: 1800 - 1899 & Number of text pages: 4-50000000 & Number of figures: 1-5

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LTA (10) · propulsion (8) · navigation (5) · propeller (5) · balloon (4) · car (3) · marine (3) · frame (3) · hybrid (2) · military (2) · gas (2) · propellers (2) · safety (2) · Windmill (2) · airfoil (2) · airship (2) · track (2)
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