Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33082 | Combustion product condensing water heater | Andrew D. Vasilakis | 1989-10-10 |
| 4798240 | Integrated space heating, air conditioning and potable water heating appliance | George M. Celorier, Jr., Wayne S. Hill | 1989-01-17 |