Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6954689 | Method and apparatus for monitoring work vehicles | Garry L. Ball, Steven E. Valla | 2005-10-11 |
| 4455595 | Packaged add-on device for lead-type ballast and luminaire which incorporates such packaged add-on device | Joseph C. Engel, Kenneth W. Simms, Robert J. Spreadbury | 1984-06-19 |