Signal selecting system,申请号US19330703218-传众专利搜索

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发明名称	Signal selecting system
摘要
申请公布号	US2077049(A)	申请公布日期	1937.04.13
申请号	US19330703218	申请日期	1933.12.20
申请人	HAZELTINE CORPORATION	发明人	MACDONALD WILLIAM A.
分类号	H03H7/01	主分类号	H03H7/01
代理机构		代理人
主权项
地址

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