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经营范围
发明名称
Ultrahigh vacuum gauge having two collector electrodes
摘要
申请公布号
US3310699(A)
申请公布日期
1967.03.21
申请号
US19640404212
申请日期
1964.10.16
申请人
NATIONAL RESEARCH CORPORATION
发明人
JR. FRANKLIN L. TORNEY,
分类号
H01J41/04
主分类号
H01J41/04
代理机构
代理人
主权项
地址
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