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经营范围
发明名称
Silver tarnish inhibitor
摘要
申请公布号
US2117657(A)
申请公布日期
1938.05.17
申请号
US19340760048
申请日期
1934.12.31
申请人
THE DRACKETT COMPANY
发明人
GANGLOFF WILMER C.;HIERONYMUS RUSSELL H.
分类号
C23C22/58
主分类号
C23C22/58
代理机构
代理人
主权项
地址
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