Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885573 | Diagnostic system for combustion controller | George R. Hall, II, Robert A. Smith | 1989-12-05 |
| 4875000 | Current fault detection system and method for AC controller | John W. Robertson, Edward Bastijanic | 1989-10-17 |
| 4837501 | Apparatus for measuring differential impedances | Robert A. Smith | 1989-06-06 |
| 4812848 | Analog to digital conversion | — | 1989-03-14 |