Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6839251 | Apparatus and method for filtering voltage for an electrostatic precipitator | David F. Johnston, Michael Mahler, Terry Lewis Farmer | 2005-01-04 |
| 6611440 | Apparatus and method for filtering voltage for an electrostatic precipitator | David F. Johnston, Michael Mahler, Terry Lewis Farmer | 2003-08-26 |
| 5950441 | Method and apparatus for controlling an evaporative gas conditioning system | Anand Mahableshwarkar, Michael Mahler, David F. Johnston | 1999-09-14 |
| 5890369 | Method for controlling an evaporative gas conditioning system | Anand Mahableshwarkar, Michael Mahler, David F. Johnston | 1999-04-06 |