Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854957 | Method for modifying coloration in tinted photochromic glasses | Nicholas Francis Borrelli | 1989-08-08 |
| 4797144 | Deep pressing mold and process for molded optical elements | Jeffery Alan DeMeritt, Thomas E. Patykula | 1989-01-10 |