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发明名称
Improvements in or relating to electro-acoustic devices for transmitting or reproducing sound
摘要
申请公布号
GB495147(A)
申请公布日期
1938.11.08
申请号
GB19370032195
申请日期
1937.11.23
申请人
STANLEY HARRISON INKSTER
发明人
分类号
H04R9/00
主分类号
H04R9/00
代理机构
代理人
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