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发明名称
Matrix changing device
摘要
申请公布号
US2240956(A)
申请公布日期
1941.05.06
申请号
US19370181845
申请日期
1937.12.27
申请人
EARL MORGAN JAMES
发明人
MORGAN JAMES EARL
分类号
B41B11/18
主分类号
B41B11/18
代理机构
代理人
主权项
地址
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