Improvements in or relating to automatic telephone systems,申请号GB19320002201-传众专利搜索

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发明名称	Improvements in or relating to automatic telephone systems
摘要
申请公布号	GB392288(A)	申请公布日期	1933.05.18
申请号	GB19320002201	申请日期	1932.01.25
申请人	THE GENERAL ELECTRIC COMPANY LIMITED;RONALD MARSDEN HAMILTON	发明人
分类号	H04Q3/42	主分类号	H04Q3/42
代理机构		代理人
主权项
地址

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