Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10513398 | Roller | — | 2019-12-24 |
| 7252052 | Gas-fired heating apparatus | Alexander Groehl, Robert Hirsch | 2007-08-07 |
| 6945196 | Gas-fired water heater | Stefan Hubert, Oliver Forberich, Alexander Groehl, Rainer Neubauer | 2005-09-20 |
| 6129545 | Gas burner with pollution-reducing features | Michael Kahlke, Herwig Scheidler | 2000-10-10 |