Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5020512 | Water heater construction and method of heating water | Otto Z. Vago | 1991-06-04 |
| 4889105 | Water heater construction and method of manufacture | Otto Z. Vago | 1989-12-26 |