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发明名称
Sound projection system
摘要
申请公布号
US2710662(A)
申请公布日期
1955.06.14
申请号
US19480067019
申请日期
1948.12.23
申请人
ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY
发明人
CAMRAS MARVIN
分类号
H04R5/02
主分类号
H04R5/02
代理机构
代理人
主权项
地址
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