Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5284126 | High performance combustion heater | — | 1994-02-08 |
| 4915091 | High efficiency combustion heater | — | 1990-04-10 |
| 4722322 | High efficiency combustion heater | Frederick M. Varney | 1988-02-02 |
| 4637376 | High efficiency solar heater | Frederick M. Varney | 1987-01-20 |