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经营范围
发明名称
Prestressed structural unit
摘要
申请公布号
US2178097(A)
申请公布日期
1939.10.31
申请号
US19370179654
申请日期
1937.12.14
申请人
JOHN B. PIERCE FOUNDATION
发明人
DAVISON ROBERT L.;ANDEREGG FREDERICK O.
分类号
B28B23/04
主分类号
B28B23/04
代理机构
代理人
主权项
地址
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