Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6102288 | Card for a pledge lock | — | 2000-08-15 |
| 5655395 | Card for a pledge lock | — | 1997-08-12 |
| 5589677 | Pledge lock for a shopping trolley | — | 1996-12-31 |
| 5573097 | Shopping or luggage cart with lock | — | 1996-11-12 |
| 5549409 | Receiving member for a pledge lock of a shopping trolley | — | 1996-08-27 |
| 5513507 | Card for a pledge lock | — | 1996-05-07 |
| 5377806 | Token- or card-operated lock for shopping or luggage cart | — | 1995-01-03 |
| D333969 | Lock for securing shopping carts when nested together | — | 1993-03-16 |