Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12371263 | Vending track for pushable vehicle | Boerge Johan Svaeren, Daniel Leigh Otterson | 2025-07-29 |
| 6142283 | Cart management system | Keith Louis Amdahl, Dan L. Otterson, Mark G. Bussey, Fred C. Zimmerman, Verne L. Severson | 2000-11-07 |
| 6125985 | Cart management system | Keith Louis Amdahl, Dan L. Otterson, Mark G. Bussey, Fred C. Zimmerman, Verne L. Severson | 2000-10-03 |
| 6024203 | Cart management system and method | Keith Louis Amdahl, Mark G. Bussey | 2000-02-15 |
| 5921373 | Cart management system | Keith Louis Amdahl, Dan L. Otterson, Mark G. Bussey, Fred C. Zimmerman, Verne L. Severson | 1999-07-13 |
| 5526916 | Cart management system | Keith Louis Amdahl, Dan L. Otterson, Verne L. Severson | 1996-06-18 |