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经营范围
发明名称
Acoustic construction
摘要
申请公布号
US1972563(A)
申请公布日期
1934.09.04
申请号
US19330654411
申请日期
1933.01.31
申请人
RICHARD IRVIN
发明人
IRVIN RICHARD
分类号
E04B1/84;E04B1/86
主分类号
E04B1/84
代理机构
代理人
主权项
地址
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