Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4914278 | Internally illuminated reset counter | Arnold C. Johnson | 1990-04-03 |
| 4829164 | Counter | Arnold C. Johnson, Paul L. Kennedy | 1989-05-09 |
| 4774398 | Counter | Arnold C. Johnson | 1988-09-27 |