PHOTOELECTRIC DOCUMENT TESTER USING LIGHT BEAMS OF COMPLEMENTARY COLOR
United States Patent 3436552
US Patent References:
Apparatus for measuring the color of light
- - 2203036
Apparatus and method for determining the character of a document
- - 2941187
Photosensitive currency testing device
- - 3109100
Apparatus for measuring the color of light
- - 2203036
Apparatus and method for determining the character of a document
- - 2941187
Photosensitive currency testing device
- - 3109100
Inventors:
Bayha, Jack E.
Publication Date:
04/01/1969
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Export Citation:
Assignee:
TRANSMARINE CORP
Primary Class:
Other Classes:
250/226
International Classes:
G07D7/00; G01N21/30