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经营范围
发明名称
Mechanical binding
摘要
申请公布号
US2502493(A)
申请公布日期
1950.04.04
申请号
US19450602985
申请日期
1945.07.03
申请人
TRUSSELL CLARENCE D
发明人
TRUSSELL CLARENCE D.
分类号
B42B5/10
主分类号
B42B5/10
代理机构
代理人
主权项
地址
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