Measured service telephone system,申请号US19350033476-传众专利搜索

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发明名称	Measured service telephone system
摘要
申请公布号	US2093988(A)	申请公布日期	1937.09.28
申请号	US19350033476	申请日期	1935.07.27
申请人	TELEPHON-APPARAT FABRIK E. ZWIETUSCH AND COMPANY	发明人	APPELIUS FRITZ;LANGNER HEINRICH
分类号	H04M17/02	主分类号	H04M17/02
代理机构		代理人
主权项
地址

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