Method of determining the surface characteristics of workpieces
United States Patent 2138411

Inventors:
Valdemar, Tornebohm Hilding
Publication Date:
11/29/1938
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Assignee:
SKF SVENSKA KULLAGERFAB AB
Primary Class:
73/81
Other Classes:
73/105, 33/533, 33/567
International Classes:
G01B5/28