Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4302656 | Controlling the operations of an electric arc welder | Leonhard Poth, Peter W. Hildebrandt, Horst Klett | 1981-11-24 |
| 4233494 | Throughflow electric heater for fluids such as air | Walter Fierlbeck | 1980-11-11 |