Drilldown: Patents

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Patents > Applicant is inventor: Yes & Patent agent : Herbert Haddan & Co. or J. Germain or None & CPCs: CPC B64C39/00

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airplane (11) · Propulsion (6) · None (5) · Design (5) · Stability (5) · propellers (5) · aerodynamics (3) · lift (3) · landing (3) · frame (3) · Wings (3) · automatic stability (3) · Coleopter (3)
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