Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854957 | Method for modifying coloration in tinted photochromic glasses | Paul Arthur Sachenik | 1989-08-08 |
| 4840655 | Method for making colored photochromic glasses | Brent M. Wedding | 1989-06-20 |
| 4832724 | Method of making colored photochromic glasses | Dennis W. Smith, Brent M. Wedding | 1989-05-23 |