Variable pitch propeller mechanism,申请号US19310578513-传众专利搜索

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发明名称	Variable pitch propeller mechanism
摘要
申请公布号	US1972486(A)	申请公布日期	1934.09.04
申请号	US19310578513	申请日期	1931.12.02
申请人	PATRICK H. CROW	发明人	HOOVER WALTER S.
分类号	B64C11/42	主分类号	B64C11/42
代理机构		代理人
主权项
地址

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