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发明名称
Acoustic materials
摘要
申请公布号
US2028180(A)
申请公布日期
1936.01.21
申请号
US19300482678
申请日期
1930.09.18
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
ARNOLD HAROLD D.
分类号
E04B1/84;E04B1/86
主分类号
E04B1/84
代理机构
代理人
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地址
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