BV

Barry VanGemert

TO Transitions Optical: 2 patents #67 of 143Top 50%
Overall (All Time): #2,285,946 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5405958 Photochromic spiro(indoline)naphthoxazine compounds 1995-04-11
5274132 Photochromic naphthopyran compounds 1993-12-28