Drilldown: Patents

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Patents > National tech categories : AT 77d or USPC 244/6 & Number of claims: 4

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airplane (12) · frame (9) · propulsion (4) · stability (4) · construction (4) · propeller (3) · LTA (3) · hybrid (3) · helicopter (3)
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Showing below up to 22 results in range #1 to #22.

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