Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889105 | Water heater construction and method of manufacture | Ernest Wenczl | 1989-12-26 |
| 4838211 | Water heater construction and method of heating water | — | 1989-06-13 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889105 | Water heater construction and method of manufacture | Ernest Wenczl | 1989-12-26 |
| 4838211 | Water heater construction and method of heating water | — | 1989-06-13 |