Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5934554 | Room temperature sensor and thermostat control device | Donald E. Charles, Kenneth F. Wolfinger | 1999-08-10 |
| 5816492 | Room temperature sensor and thermostat control device | Donald E. Charles, Kenneth F. Wolfinger | 1998-10-06 |