Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5315732 | Toothbrush having adjustable brushing pressure | Frank J. Burrell, Jr. | 1994-05-31 |
| 5163917 | Barrel mounted needle guard for hypodermic syringes | Frank J. Burrell, Jr. | 1992-11-17 |