Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8532640 | Software key control for mobile devices | Fred C. Zimmerman | 2013-09-10 |
| 7792522 | Software key control for mobile devices | Fred C. Zimmerman | 2010-09-07 |
| 6142283 | Cart management system | Keith Louis Amdahl, Dan L. Otterson, Christopher J. Rogney, Fred C. Zimmerman, Verne L. Severson | 2000-11-07 |
| 6125985 | Cart management system | Keith Louis Amdahl, Dan L. Otterson, Christopher J. Rogney, Fred C. Zimmerman, Verne L. Severson | 2000-10-03 |
| 6024203 | Cart management system and method | Keith Louis Amdahl, Christopher J. Rogney | 2000-02-15 |
| 5921373 | Cart management system | Keith Louis Amdahl, Dan L. Otterson, Christopher J. Rogney, Fred C. Zimmerman, Verne L. Severson | 1999-07-13 |