Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653972 | Preserved ophthalmic drug compositions containing polymeric quaternary ammonium compounds | Diane S. Nelms | 1997-08-05 |
| 5603929 | Preserved ophthalmic drug compositions containing polymeric quaternary ammonium compounds | Diane S. Nelms | 1997-02-18 |