Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6126827 | High-strength septage biological treatment system | Charles L. Johnson, William Brinton | 2000-10-03 |
| 5365701 | Multi-focal contact lens | — | 1994-11-22 |
| 5181053 | Multi-focal contact lens | — | 1993-01-19 |