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发明名称
Graphic recording
摘要
申请公布号
US2624652(A)
申请公布日期
1953.01.06
申请号
US19440558252
申请日期
1944.10.11
申请人
CARLSON CHESTER F
发明人
CARLSON CHESTER F.
分类号
G03G13/26;G03G15/30
主分类号
G03G13/26
代理机构
代理人
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