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发明名称
Loose-leaf binder
摘要
申请公布号
US2311088(A)
申请公布日期
1943.02.16
申请号
US19410387902
申请日期
1941.04.10
申请人
NATIONAL BLANK BOOK COMPANY
发明人
SCHADE JOHN
分类号
B42F13/28
主分类号
B42F13/28
代理机构
代理人
主权项
地址
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Rotary saw with sawdust extraction - has tangential passage in housing from blade underside to union near hinge
