Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5091095 | System for controlling drain system treatment using temperature and level sensing means | Carl F. Fries, Yoram J. Fridman | 1992-02-25 |
| 4979237 | Disposable sanitary protector cover for toilet | Carl F. Fries | 1990-12-25 |
| 4911832 | Automatic drain system treatment apparatus | Adam C. Miller, William G. Harvey | 1990-03-27 |
| 4797208 | Automatic drain system treatment process | Adam C. Miller, William G. Harvey | 1989-01-10 |
| 4583947 | Custom dentures and method of making same | — | 1986-04-22 |
| 4470815 | Method of making custom dentures | — | 1984-09-11 |