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经营范围
发明名称
Improvements in or relating to acoustic reproducers
摘要
申请公布号
GB469194(A)
申请公布日期
1937.07.21
申请号
GB19360004761
申请日期
1936.02.17
申请人
DONALD WILLIAM SHEPHERD WEEKS;THE BENJAMIN ELECTRIC LIMITED
发明人
分类号
H04R1/24
主分类号
H04R1/24
代理机构
代理人
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地址
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