Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4725822 | Shopping cart with lower tray signalling device | — | 1988-02-16 |
| 4723118 | Magnetic detection system for items on the lower tray of a shopping cart | Patrick J. Utecht | 1988-02-02 |
| 4465290 | Shopping cart with lower tray signalling device | — | 1984-08-14 |