Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8404020 | Systems and methods for monitoring a rapping process | Terry Lewis Farmer, Vivek Venugopal Badami, Charles Erklin Seeley, David F. Johnston, Michael Mahler | 2013-03-26 |
| 5705923 | Variable inductance current limiting reactor control system for electrostatic precipitator | David F. Johnston, Michael Mahler | 1998-01-06 |