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公开(公告)号：US2879142A
公开(公告)日：1959-03-24
申请号：US53560255
申请日：1955-09-21
Applicant: MINE SAFETY APPLIANCES CO
Inventor： JONES CLARENCE I , MORRIS ROBERT A
IPC: G01N27/16
CPC classification number: G01N27/16
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2.发明授权Method and apparatus for detecting minute concentrations of gases and vapors 失效用于检测气体和蒸气的微小浓度的方法和装置
公开(公告)号：US2968730A
公开(公告)日：1961-01-17
申请号：US70084457
申请日：1957-12-05
Applicant: MINE SAFETY APPLIANCES CO
Inventor： MORRIS ROBERT A , VON HEINE-GELDERN ROBERT
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