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发明名称
Resilient railway spike
摘要
申请公布号
US2224940(A)
申请公布日期
1940.12.17
申请号
US19380214424
申请日期
1938.06.18
申请人
WARR HAROLD G;WILLARD GEORGE T
发明人
WARR HAROLD G.;WILLARD GEORGE T.
分类号
E01B9/08
主分类号
E01B9/08
代理机构
代理人
主权项
地址
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