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发明名称
Ceiling mounting for speaker
摘要
申请公布号
US2913067(A)
申请公布日期
1959.11.17
申请号
US19580757961
申请日期
1958.08.29
申请人
JOHNSTON CLARENCE A
发明人
JOHNSTON CLARENCE A.
分类号
H04R1/02
主分类号
H04R1/02
代理机构
代理人
主权项
地址
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