Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6628568 | System and method for verification of acoustic horn performance | David F. Johnston, Terry Lewis Farmer | 2003-09-30 |
| 6611440 | Apparatus and method for filtering voltage for an electrostatic precipitator | David F. Johnston, Terry Lewis Farmer, Robert Hummell | 2003-08-26 |
| 6540812 | Method and system for improved rapper control | Terry Lewis Farmer, David F. Johnston, Sven Richter | 2003-04-01 |