Telephone system,申请号US19400330974-传众专利搜索

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发明名称	Telephone system
摘要
申请公布号	US2249449(A)	申请公布日期	1941.07.15
申请号	US19400330974	申请日期	1940.04.22
申请人	ASSOCIATED ELECTRIC LABORATORIES, INC.	发明人	WICKS JOHN
分类号	H04M3/60	主分类号	H04M3/60
代理机构		代理人
主权项
地址

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