Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340200 | Brush recycling apparatus | — | 1994-08-23 |
| 5253927 | Toothbrush recycling apparatus and method | — | 1993-10-19 |
| 4987903 | Method and apparatus for identifying and alleviating semantic memory deficiencies | William Keppel | 1991-01-29 |
| 4984578 | Method and apparatus for identifying and alleviating semantic memory deficiencies | William Keppel | 1991-01-15 |