Telephone system,申请号US19410389138-传众专利搜索

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法人/股东/高管

发明名称	Telephone system
摘要
申请公布号	US2293588(A)	申请公布日期	1942.08.18
申请号	US19410389138	申请日期	1941.04.18
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	CAIN GEORGE LELAND;SOUCY HAROLD ARTHUR
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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