Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4281992 | Prosthetic denture prepared from polyurethane elastomer | Ralph W. Colpitts | 1981-08-04 |
| 4225696 | Prosthetic denture prepared from polyurethane elastomer | Ralph W. Colpitts | 1980-09-30 |