Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857305 | N-phenylphthalisoimides as ultraviolet radiation absorbers | Randal J. Bernhardt | 1989-08-15 |
| 4788054 | N-phenylphthalisomides as ultraviolet radiation absorbers | Randal J. Bernhardt | 1988-11-29 |