Variable pitch propeller,申请号US19300463893-传众专利搜索

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发明名称	Variable pitch propeller
摘要
申请公布号	US1874714(A)	申请公布日期	1932.08.30
申请号	US19300463893	申请日期	1930.06.26
申请人	SPERRY DEVELOPMENT COMPANY	发明人	SPERRY ELMER A.;PERRY WALTER M.
分类号	B64C11/36	主分类号	B64C11/36
代理机构		代理人
主权项
地址

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