Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826889 | Dimensionally stable oxygen permeable hard contact lens material and method of manufacture | Edward J. Ellis | 1989-05-02 |
| 4357173 | Lens cleaning and polishing method | Perry Rosenthal | 1982-11-02 |
| 4330383 | Dimensionally stable oxygen permeable hard contact lens material and method of manufacture | Edward J. Ellis | 1982-05-18 |