Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D352396 | Toothbrush | John P. Curtis, John C. Crawford, James H. Kemp, Thomas Mintel, Bert D. Heinzelman +5 more | 1994-11-15 |
| 5341537 | Plaque removing toothbrush | John P. Curtis, John C. Crawford, James H. Kemp, Thomas Mintel, Bert D. Heinzelman +2 more | 1994-08-30 |
| 5335389 | Plaque removing toothbrush | John P. Curtis, John C. Crawford, James H. Kemp, Thomas Mintel, Bert D. Heinzelman +2 more | 1994-08-09 |
| D343294 | Toothbrush head and neck unit | John P. Curtis, John C. Crawford, James H. Kemp, Thomas Mintel, Bert D. Heinzelman +2 more | 1994-01-18 |