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摘要
申请公布号
US1861765(A)
申请公布日期
1932.06.07
申请号
US19310554528
申请日期
1931.08.01
申请人
TRETBAR JR EDWARD F
发明人
JR. EDWARD F. TRETBAR,
分类号
B41N6/00
主分类号
B41N6/00
代理机构
代理人
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