Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878459 | Water heater construction | — | 1989-11-07 |
| 4878323 | Truss setting system | — | 1989-11-07 |
| 4875272 | Method of making spaced-wall appliance with a sealing and insulating device between said walls | — | 1989-10-24 |
| 4865014 | Water heater and method of fabricating same | — | 1989-09-12 |
| 4860728 | Water heater device | — | 1989-08-29 |
| 4844049 | Water heater device | — | 1989-07-04 |
| 4798308 | Water heater construction and method of making same | — | 1989-01-17 |