Telephone station circuit,申请号US19430478499-传众专利搜索

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发明名称	Telephone station circuit
摘要
申请公布号	US2375791(A)	申请公布日期	1945.05.15
申请号	US19430478499	申请日期	1943.03.09
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	JOHNSON KENNETH S.
分类号	H04M1/58	主分类号	H04M1/58
代理机构		代理人
主权项
地址

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