Variable pitch propeller,申请号US19390298597-传众专利搜索

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发明名称	Variable pitch propeller
摘要
申请公布号	US2279633(A)	申请公布日期	1942.04.14
申请号	US19390298597	申请日期	1939.10.09
申请人	HENNING J. SELLBERG;RALPH L. SWITZER	发明人	MERICKLE ARNOLD J.
分类号	B63H3/04	主分类号	B63H3/04
代理机构		代理人
主权项
地址

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