Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4910878 | Suspended-cable apparatus for measuring level of material in a storage vessel | Randall J. Regentin, John T. Knepler | 1990-03-27 |
| 4875295 | Drop-weight material level indicator | — | 1989-10-24 |
| 4811160 | Capacitance-type material level probe | — | 1989-03-07 |
| 4695685 | Rotating paddle bin level indicator | Norman F. Marsh | 1987-09-22 |
| 4549245 | Capacitance-type material level probe and method of manufacture | — | 1985-10-22 |
| 4499641 | Method of manufacturing capacitance-type material level indicator probe | — | 1985-02-19 |