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发明名称
Lightweight synthetic stone and process of making it
摘要
申请公布号
US2240963(A)
申请公布日期
1941.05.06
申请号
US19380206472
申请日期
1938.05.06
申请人
ROSTONE CORPORATION
发明人
SWEZEY JOHN W.;JONES PAUL W.
分类号
C04B28/18
主分类号
C04B28/18
代理机构
代理人
主权项
地址
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