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经营范围
发明名称
Pitch resin
摘要
申请公布号
US2462593(A)
申请公布日期
1949.02.22
申请号
US19450611130
申请日期
1945.08.17
申请人
THE UNITED GAS IMPROVEMENT COMPANY
发明人
BATCHELDER HOWARD R.
分类号
C10G21/00
主分类号
C10G21/00
代理机构
代理人
主权项
地址
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