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经营范围
发明名称
Modified clay
摘要
申请公布号
US2307239(A)
申请公布日期
1943.01.05
申请号
US19390296569
申请日期
1939.09.26
申请人
EDGAR BROTHERS COMPANY
发明人
ROWLAND BEN W.
分类号
D21H19/40
主分类号
D21H19/40
代理机构
代理人
主权项
地址
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