Dialing and for dial telephones,申请号US19490116524-传众专利搜索

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发明名称	Dialing and for dial telephones
摘要
申请公布号	US2520834(A)	申请公布日期	1950.08.29
申请号	US19490116524	申请日期	1949.09.19
申请人	JOSEPH CRAWFORD	发明人	CRAWFORD JOSEPH
分类号	H04M1/23	主分类号	H04M1/23
代理机构		代理人
主权项
地址

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