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申请公布号
US2003787(A)
申请公布日期
1935.06.04
申请号
US19330695647
申请日期
1933.10.28
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
LAKE CLAIR D.
分类号
G07C1/06
主分类号
G07C1/06
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