Dual air screw propeller,申请号US19650491961-传众专利搜索

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发明名称	Dual air screw propeller
摘要
申请公布号	US3282352(A)	申请公布日期	1966.11.01
申请号	US19650491961	申请日期	1965.10.01
申请人	SIPTROTT FRED M	发明人	SIPTROTT FRED M.
分类号	B64C11/48	主分类号	B64C11/48
代理机构		代理人
主权项
地址

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