Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6215108 | Multiple electric element mounting system | Ronald G. Butcher, Raymond A. Rust, Jr., David C. Sherrod | 2001-04-10 |
| 4936101 | Fan arrangement for thru-the-wall unit | Dwight H. Heberer | 1990-06-26 |
| 4911234 | Heat exchanger coil with restricted airflow accessibility | Dwight H. Heberer, Kevin Torrance | 1990-03-27 |