Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5429186 | Open hot-water heater | Reinhold Elflein | 1995-07-04 |
| 4906817 | Overflow compensation device for a water heater using a variable volume bellows | — | 1990-03-06 |
| 4862834 | Open hot water heater | Reinhold Elflein | 1989-09-05 |