Drilldown: Patents

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Patents > Year filed: 1909 & National tech categories : AT 77d or GB 4 propel

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airplane (10) · LTA (8) · stability (6) · frame (6) · wings (5) · Propulsion (5) · design (4) · whole (4) · Propellers (4) · None (4) · construction (3) · Control (3) · wheels (3) · Subsystem (3) · navigation (3) · balloon (3) · Drachenflieger (3)
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Showing below up to 32 results in range #1 to #32.

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