Title:
Means for indicating flaws in materials
Document Type and Number:
United States Patent 2164125
Inventors:
Sergey, Sokoloff
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Publication Date:
06/27/1939
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Assignee:
Sergey, Sokoloff
Primary Class:
Other Classes:
348/125, 348/163, 315/1, 310/336, 702/35, 73/104, 324/71.100, 116/137A, 367/7, 313/367
International Classes:
G01N29/06