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Techtypes > Keywords: Propellers

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CPC B64D/62 (8) · simple tech terms (4) · USPC 244/65 (4) · CPC B64C11/00 (4) · CPC B64C11/20 (3) · CPC F05B (3) · CPC B64C27/00 (3) · USPC 244/62 (3) · CPC F05B2260/00 (2) · lift (2) · propulsion (2) · sustentation (2) · Swiss patent classifications, 1908-1920 (2) · aerial navigation (2) · USPC 416/147 (2) · CPC B64C11/16 (2)
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