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经营范围
发明名称
Improvements in or relating to loud speakers and loud speaker horns
摘要
申请公布号
GB566398(A)
申请公布日期
1944.12.28
申请号
GB19430009944
申请日期
1943.06.21
申请人
GUY R. FOUNTAIN LIMITED;HENRY JOHN HOULGATE;GEORGE CHARLES WHEELER
发明人
分类号
H04R1/30
主分类号
H04R1/30
代理机构
代理人
主权项
地址
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