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RV
Richard D. Vanvalin
HA
Hach
: 1 patents #109 of 214
Top 55%
Overall (All Time):
#3,849,925
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Top 95%
1
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Patent #
Title
Co-Inventors
Date
D325881
Color comparator
Scott V. Brayton
,
Timothy J. Gaul
1992-05-05
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