Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858932 | Nonuniform probability reel stop mechanism for gaming machines | — | 1989-08-22 |
| 4831242 | Control system for health club facilities and equipment | William H. Englehardt, Olgerts J. Svilans, Russell W. Krch | 1989-05-16 |