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发明名称
Bleaching process
摘要
申请公布号
US1872743(A)
申请公布日期
1932.08.23
申请号
US19270234923
申请日期
1927.11.21
申请人
PAPER PATENTS COMPANY
发明人
JOHN HANS
分类号
D21C9/10
主分类号
D21C9/10
代理机构
代理人
主权项
地址
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