Title:
Spot testing
United States Patent 2839368


Inventors:
Mccounaughey, Paul W.
Application Number:
US58693456A
Publication Date:
06/17/1958
Filing Date:
05/24/1956
Assignee:
MINE SAFETY APPLIANCES CO
Primary Class:
Other Classes:
436/73
International Classes:
G01N31/22
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