VISUAL INSPECTION MEDIA AND MODE OF OPERATION
United States Patent 3452189
US Patent References:
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- - 1417123


Inventors:
Lowery, Carthel D.
Publication Date:
06/24/1969
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Assignee:
Carthel, Lowery D.
Primary Class:
362/139
Other Classes:
359/872
International Classes:
G02B23/24; F21L1/00




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