IMPROVEMENTS RELATING TO LOUDSPEAKING TELEPHONES,申请号GB19690041763-传众专利搜索

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发明名称	IMPROVEMENTS RELATING TO LOUDSPEAKING TELEPHONES
摘要
申请公布号	GB1243863(A)	申请公布日期	1971.08.25
申请号	GB19690041763	申请日期	1969.08.21
申请人	THE PLESSEY COMPANY LIMITED	发明人	GEORGE WILLIAM JONES
分类号	H04M1/60	主分类号	H04M1/60
代理机构		代理人
主权项
地址

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