Title:
METHANE AND COAL DUST DETECTION
United States Patent 3496558
Inventors:
Willson, John E.
Kahle, Michael B.
Kahle, Michael B.
Publication Date:
02/17/1970
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Export Citation:
Assignee:
Univ, Utah
Primary Class:
Other Classes:
356/439, 250/565, 340/630, 73/31.050, 340/632
International Classes:
G01N25/54; G01N25/00; G08B19/00; G01N21/26; G01N31/12
Foreign References:
| IT270321B | ||||
| DE1124853B |