Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4699122 | Storage water heater system | Theo Jannemann | 1987-10-13 |
| 4557220 | Gas apparatus for producing hot water | Theo Jannemann | 1985-12-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4699122 | Storage water heater system | Theo Jannemann | 1987-10-13 |
| 4557220 | Gas apparatus for producing hot water | Theo Jannemann | 1985-12-10 |