Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6112143 | Method and apparatus for establishing a perimeter defining an area to be traversed by a mobile machine | William E. Allen | 2000-08-29 |
| 6076843 | Guarding mechanism for a wheel and axle assembly | — | 2000-06-20 |
| 5967630 | Guard and cleaner assembly for a wheel | — | 1999-10-19 |