Drilldown: Patents

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Patents > Year filed: 1907 & National tech categories : AT 77d or BE K

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Airplane (23) · None (14) · LTA (12) · Design (8) · Propulsion (7) · flapping (5) · wings (5) · Frame (4) · rarefaction (3) · Ascension (3) · Hybrid (3) · HTA (3) · Sustentation (3) · Steering (3) · construction (3) · Control (3)
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Showing below up to 57 results in range #1 to #57.

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