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发明名称
Free-opening side stitched book and method of making same
摘要
申请公布号
US2245891(A)
申请公布日期
1941.06.17
申请号
US19380241381
申请日期
1938.11.19
申请人
ACKLEY RAYMOND E
发明人
ACKLEY RAYMOND E.
分类号
B42B2/00;B42B4/00;B42D1/00
主分类号
B42B2/00
代理机构
代理人
主权项
地址
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