Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836556 | Dart game target construction | Robert J. Brejcha, Gregory William Lantz | 1989-06-06 |
| 4807887 | Missed hit and player proximity detection system for electronic projectile game | Douglas W. Adams, Robert W. Van Naarden | 1989-02-28 |