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经营范围
发明名称
Improvements in or relating to loudspeakers having a conical diaphragm
摘要
申请公布号
GB722263(A)
申请公布日期
1955.01.19
申请号
GB19510023045
申请日期
1951.10.03
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;FRANCIS HUGH BRITTAIN
发明人
分类号
H04R1/22
主分类号
H04R1/22
代理机构
代理人
主权项
地址
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