Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863172 | Front and back grids comprising puzzle with movable squares | Donald A. Rosenwinkel, Wayne A. Kuna | 1989-09-05 |
| 4852886 | Board game with stackable tokens and random moving disrupter | Donald A. Rosenwinkel, Jeffrey D. Breslow | 1989-08-01 |
| 4799678 | Electronic game with animated host | Rouben T. Terzian, Jeffrey D. Breslow, Donald A. Rosenwinkel | 1989-01-24 |