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发明名称
Water-marking
摘要
申请公布号
US2009185(A)
申请公布日期
1935.07.23
申请号
US19340718972
申请日期
1934.04.04
申请人
THE MCCORKINDALE COMPANY;AMERICAN WRITING PAPER COMPANY, INC.
发明人
MCCORKINDALE WILLIAM P.
分类号
D21F1/44
主分类号
D21F1/44
代理机构
代理人
主权项
地址
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