Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4397223 | Air distributor with automatically closable damper | — | 1983-08-09 |
| 4281592 | Double induction unit | David Ober | 1981-08-04 |
| 4264035 | Dual reset controller | Gilbert H. Avery | 1981-04-28 |
| 4245380 | Multiple heat pipe heat exchanger and method for making | — | 1981-01-20 |
| 4189092 | Damper control for preventing spread of fire and smoke through an induction mixing box | David Ober | 1980-02-19 |