Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4574775 | Direct contact water heater | William C. Lutzen, Gerald A. Roszak | 1986-03-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4574775 | Direct contact water heater | William C. Lutzen, Gerald A. Roszak | 1986-03-11 |