Title:
Device for grading color values
United States Patent 2009943
Inventors:
Munsell, Alexander E. O.
Spry, Walter T.
Publication Date:
07/30/1935
Export Citation:
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Assignee:
Munsell, Alexander E. O.
Spry, Walter T.
Primary Class:
356/421
Other Classes:
73/53.01, 422/421
International Classes:
G01N21/29; G01N21/25
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