Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5491792 | Sequence of events system using a redundant analog I/O board system | James S. Grisham, Jr. | 1996-02-13 |
| 5223821 | Triac power switching and testing system | Eric L. Poe | 1993-06-29 |
| 4872106 | Industrial process control system with back-up data processors to take over from failed primary data processors | — | 1989-10-03 |
| 4443861 | Combined mode supervisory program-panel controller method and apparatus for a process control system | — | 1984-04-17 |
| 4413314 | Industrial process control system | Dennis W. Simpson, Clarence T. Carroll | 1983-11-01 |
| 4396977 | Industrial process control system | Dennis W. Simpson | 1983-08-02 |
| 4386232 | Multiplexed touch sensitive screen system | — | 1983-05-31 |
| 4352103 | Industrial control system | — | 1982-09-28 |
| 4347563 | Industrial control system | Candelario Paredes | 1982-08-31 |