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经营范围
发明名称
Acoustical chamber
摘要
申请公布号
US3237713(A)
申请公布日期
1966.03.01
申请号
US19640383182
申请日期
1964.07.16
申请人
EDUCATIONAL RESEARCH ASSOCIATES, INC.
发明人
LESLIE JOHN C. L.
分类号
H04R1/10
主分类号
H04R1/10
代理机构
代理人
主权项
地址
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