Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807887 | Missed hit and player proximity detection system for electronic projectile game | Donald P. DeVale, Robert W. Van Naarden | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807887 | Missed hit and player proximity detection system for electronic projectile game | Donald P. DeVale, Robert W. Van Naarden | 1989-02-28 |