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发明名称
Corundum jewel
摘要
申请公布号
US2427454(A)
申请公布日期
1947.09.16
申请号
US19420428671
申请日期
1942.01.29
申请人
ALLEN HEANY JOHN
发明人
HEANY JOHN ALLEN
分类号
C30B29/26;G04B31/06
主分类号
C30B29/26
代理机构
代理人
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