Method of and apparatus for determining a degree of fineness of finely divided material
United States Patent 2065695

Inventors:
Haultain, Herbert E. T.
Publication Date:
12/29/1936
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Assignee:
Haultain, Herbert E. T.
Primary Class:
73/54.070
Other Classes:
73/438
International Classes:
G01N11/04; G01N11/00