Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6894502 | pH sensor with internal solution ground | Chang-Dong Feng, Joe N. Covey, Beth M. Covey, Richard N. Baril | 2005-05-17 |
| 5469070 | Circuit for measuring source resistance of a sensor | — | 1995-11-21 |
| 5268852 | Self diagnostic pH sensor | Timothy J. Forsythe | 1993-12-07 |
| 4829253 | Three wire amplifier circuit with diagnostic capabilities | — | 1989-05-09 |