Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4449116 | Actuated digital pretimed traffic controller | Frank W. Hill, William L. May | 1984-05-15 |
| 4355295 | Method and device for connecting terminals of a traffic control unit | — | 1982-10-19 |