Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6559653 | Three wire interface for field wiring of on/off sensors | Roger D. Chamberlain | 2003-05-06 |
| 6446012 | Proximity detector for hard-to-detect materials | Richard Livingston, Roger D. Chamberlain, Jon G. Metcalf | 2002-09-03 |
| D450611 | Proximity detector | William J. Stewart | 2001-11-20 |
| 6295881 | Sensor package for proximity detectors | William J. Stewart | 2001-10-02 |
| 6137282 | Time-domain reflectometry user input device | Theodore James Eckert, John Curtis Bell, Timothy Bell | 2000-10-24 |
| 6125642 | Oil level control system | G. Thomas Seener, Joseph H. Heffner, Roger D. Chamberlain, Richard Livingston | 2000-10-03 |