Telephone test selector,申请号US19490076366-传众专利搜索

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发明名称	Telephone test selector
摘要
申请公布号	US2623956(A)	申请公布日期	1952.12.30
申请号	US19490076366	申请日期	1949.02.14
申请人	STROMBERG-CARLSON COMPANY	发明人	KESSLER FRANK;POWELL WINFRED T.
分类号	H04Q1/26	主分类号	H04Q1/26
代理机构		代理人
主权项
地址

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