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RC Read Co.: 1 patents #3 of 6Top 50%
Overall (All Time): #3,662,480 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5961884 Blue or bluish green aluminum silicate luminous storage material and its manufacturing method Tadashi Endo 1999-10-05