Drilldown: Patents

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Patents > Year granted: 1900 - 1909 & National tech categories : BE K or DE 77 or USPC 244/30

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LTA (44) · airplane (26) · propellers (26) · hybrid (23) · propulsion (10) · navigation (8) · car (5) · safety (5) · frame (4) · dirigible (3) · compartments (3) · parachute (3) · propeller (3) · balloon (3) · rudder (3) · stability (3)
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Showing below up to 54 results in range #1 to #54.

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