Communicating device and system,申请号US19370167677-传众专利搜索

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发明名称	Communicating device and system
摘要
申请公布号	US2255840(A)	申请公布日期	1941.09.16
申请号	US19370167677	申请日期	1937.10.07
申请人	WOOLF WILLIAM L	发明人	WOOLF WILLIAM L.
分类号	H04M1/03	主分类号	H04M1/03
代理机构		代理人
主权项
地址

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