Improvements in or relating to loud speaking telephones,申请号GB19290029484-传众专利搜索

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发明名称	Improvements in or relating to loud speaking telephones
摘要
申请公布号	GB336084(A)	申请公布日期	1930.10.09
申请号	GB19290029484	申请日期	1929.09.30
申请人	THE GENERAL ELECTRIC COMPANY, LIMITED;FREDERICK CLARK;NEVILLE JAMES MCAINSH	发明人
分类号	H04R9/04	主分类号	H04R9/04
代理机构		代理人
主权项
地址

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