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发明名称
Method and apparatus for punching tie plates
摘要
申请公布号
US2332499(A)
申请公布日期
1943.10.26
申请号
US19390295204
申请日期
1939.09.16
申请人
THE COLORADO FUEL AND IRON CORPORATION
发明人
CANTRELL MARVIN L.;HED OSCAR A.
分类号
B21D28/32
主分类号
B21D28/32
代理机构
代理人
主权项
地址
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