Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5001987 | Lightweight car-on-track system | Barry L. Ziegenfus | 1991-03-26 |
| 4922831 | Lightweight car-on-track system | Barry L. Ziegenfus | 1990-05-08 |
| 4648325 | Linear drive unit | Stanley K. Gutekunst, Barry L. Ziegenfus | 1987-03-10 |
| 4593623 | Reversible, accumulating longitudinal drive tube carrier | Stanley K. Gutekunst, Barry L. Ziegenfus | 1986-06-10 |
| 4428300 | Vehicle precision stop assembly | Barry L. Ziegenfus | 1984-01-31 |
| 4357875 | Conveyor system with access way | — | 1982-11-09 |
| 4355580 | Inexpensive driverless vehicle | — | 1982-10-26 |