Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5158310 | Display system for shopping cart | John B. Tannehill, Steven L. Kramer | 1992-10-27 |
| 5072956 | Powered display for shopping cart | John B. Tannehill | 1991-12-17 |
| 4930795 | Rotary display for shopping cart | John B. Tannehill | 1990-06-05 |