Combined telephone and communicating key box,申请号US19380203373-传众专利搜索

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发明名称	Combined telephone and communicating key box
摘要
申请公布号	US2199686(A)	申请公布日期	1940.05.07
申请号	US19380203373	申请日期	1938.04.21
申请人	THE STROMBERG-CARLSON TELEPHONE MANUFACTURING COMPANY	发明人	BEYLAND SIDNEY A.
分类号	H04M1/06;H04M1/52	主分类号	H04M1/06
代理机构		代理人
主权项
地址

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