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发明名称
Expansible post binder
摘要
申请公布号
US2646800(A)
申请公布日期
1953.07.28
申请号
US19500166998
申请日期
1950.06.09
申请人
QUALITROL CORPORATION;THE LAWYER'S CO-OPERATIVE PUBLISHING COMPANY
发明人
RATCLIFFE FRED A.;RYAN NORBERT A.;FORD GEORGE E.
分类号
B42F13/00;B42F13/28
主分类号
B42F13/00
代理机构
代理人
主权项
地址
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