Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625570 | Synchronous detection and remote monitoring and regulating of cell potential for cathodic protection | Timothy B. Mullins, James B. Sullivan | 2003-09-23 |
| 4437056 | Cab signal test set for automatically testing the pickup coils and checking an amplifier of cab signal equipment | — | 1984-03-13 |
| 4314234 | Test set for railway cab signal system | John O. G. Darrow | 1982-02-02 |