Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4249696 | Charging circuit for battery in thermostat with battery operated timer | Donald E. Donnelly | 1981-02-10 |
| 4215815 | Battery operated thermostat timer with battery charging circuits | — | 1980-08-05 |