Linear dial call transmitter,申请号US19500195209-传众专利搜索

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发明名称	Linear dial call transmitter
摘要
申请公布号	US2635230(A)	申请公布日期	1953.04.14
申请号	US19500195209	申请日期	1950.11.13
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	MADDEN JAMES J.
分类号	H04M1/23	主分类号	H04M1/23
代理机构		代理人
主权项
地址

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