Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6151745 | Gum-massaging oral brush | Michael F. Roberts, Edward Park, Philip Sweeney, Mingchih M. Tseng, Stephen Charles Witkus | 2000-11-28 |
| 5987688 | Gum-massaging oral brush | Michael F. Roberts, Edward Park, Philip Sweeney, Mingchih M. Tseng, Stephen Charles Witkus | 1999-11-23 |