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经营范围
发明名称
Acoustical correction machine
摘要
申请公布号
US2234789(A)
申请公布日期
1941.03.11
申请号
US19380245873
申请日期
1938.12.15
申请人
THE INSULITE COMPANY
发明人
WUNDERLICH MILTON S.
分类号
E04B1/82
主分类号
E04B1/82
代理机构
代理人
主权项
地址
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