Drilldown: Patents

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Patents > Filing date: 1907 & National tech categories : BE K or CH 129a

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Airplane (22) · None (15) · LTA (10) · design (7) · Propulsion (6) · HTA (5) · Rarefaction (5) · sustentation (4) · Ascension (4) · steering (3) · rudder (3) · frame (3) · Propellers (3) · hybrid (3) · control (3)
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Showing below up to 57 results in range #1 to #57.

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