Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5048335 | Capacitance-type material level indicator | Norman F. Marsh, Bruce W. Campbell | 1991-09-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5048335 | Capacitance-type material level indicator | Norman F. Marsh, Bruce W. Campbell | 1991-09-17 |