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经营范围
发明名称
Vacuum engine
摘要
申请公布号
US1874454(A)
申请公布日期
1932.08.30
申请号
US19310528742
申请日期
1931.04.09
申请人
NATIONAL PNEUMATIC COMPANY
发明人
CONKLIN ROSCOE D.
分类号
F01B17/00;F01B17/02;F01B29/02
主分类号
F01B17/00
代理机构
代理人
主权项
地址
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