Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
CB

Charles D. Beard

IOIolab: 4 patents #3 of 45Top 7%
Sierra Madre, CA: #67 of 216 inventorsTop 35%
California: #124,610 of 386,348 inventorsTop 35%
Overall (All Time): #1,302,508 of 4,157,543Top 35%
4 Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4803254 Vinylsilylalkoxy arylbenzotriazole compounds and UV absorbing compositions made therefrom Gary B. Dunks, Akira Yamada, Namassivaya Doddi 1989-02-07
4716234 Ultraviolet absorbing polymers comprising 2-(2'-hydroxy-5'-acryloyloxyalkoxyphenyl)-2H-benzotriazole Gary B. Dunks, Akira Yamada, Namassivaya Doddi 1987-12-29
4611061 2'-hydroxy-5'-(hydroxyalkyl)phenyl-2H-benzotriazoles Namassivaya Doddi, Akira Yamada 1986-09-09
4528311 Ultraviolet absorbing polymers comprising 2-hydroxy-5-acrylyloxyphenyl-2H-benzotriazoles Akira Yamada, Namassivaya Doddi 1985-07-09