Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4942529 | Lift truck control systems | Isaac Avitan, David L. Kellogg, Stephen Page, David J. Radley | 1990-07-17 |
| 4496031 | Material handling apparatus | Christian D. Gibson | 1985-01-29 |
| 4439102 | Material handling apparatus | — | 1984-03-27 |