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发明名称
Acoustic tile
摘要
申请公布号
US2090043(A)
申请公布日期
1937.08.17
申请号
US19360058965
申请日期
1936.01.13
申请人
MARTIN HEERWAGEN PAUL
发明人
HEERWAGEN PAUL MARTIN
分类号
E04B1/82;E04B1/84
主分类号
E04B1/82
代理机构
代理人
主权项
地址
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