Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5983455 | Multi-faceted extension pole | Bruce C. Polzin, Anthony W. Gilbert, Robert A. Shaffer | 1999-11-16 |
| D406465 | Set of grips for a roller frame handle | William W. Barton, Thomas D. Koos, Anthony W. Gilbert, Robert A. Shaffer | 1999-03-09 |