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Patents > Patent agent : Frank T. Wentworth or Herbert Haddan & Co. & Number of claims: 2-3

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stability (6) · Frame (6) · airplane (5) · LTA (5) · None (4) · Construction (4) · automatic stability (4) · control (4) · safety (3) · propellers (3) · hybrid (3) · design (3) · wings (3)
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CPC B64C17/00 (3) · CPC B64C2700/6216 (3) · CPC B64C17/06 (3) · None (2) · CPC B64D17/80 (2) · CPC B64C39/00 (2) · CPC B64C2700/6218 (2) · CPC B64C2700/6295 (2)
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