Magnetic steering indicator,申请号US19280327991-传众专利搜索

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发明名称	Magnetic steering indicator
摘要
申请公布号	US1977615(A)	申请公布日期	1934.10.23
申请号	US19280327991	申请日期	1928.12.22
申请人	SUBMARINE SIGNAL COMPANY	发明人	BEERS ROLAND F.
分类号	B63H25/04	主分类号	B63H25/04
代理机构		代理人
主权项
地址

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