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经营范围
发明名称
Euhedral corundum crystal
摘要
申请公布号
US1966406(A)
申请公布日期
1934.07.10
申请号
US19280311262
申请日期
1928.10.08
申请人
THE EXOLON COMPANY
发明人
HAUMAN EARL LEESON
分类号
C04B35/107
主分类号
C04B35/107
代理机构
代理人
主权项
地址
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