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经营范围
发明名称
Shovel tooth
摘要
申请公布号
US1804756(A)
申请公布日期
1931.05.12
申请号
US19290389414
申请日期
1929.08.30
申请人
FRANK A. THOMPSON
发明人
ELWOOD FRANK
分类号
E02F9/28
主分类号
E02F9/28
代理机构
代理人
主权项
地址
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