Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4528434 | Coiler-furnace unit | Franz Hirschmanner | 1985-07-09 |
| 4465912 | Coiler-furnace combination | Franz Brettbacher, Karl Moshammer, Franz Hirschmanner | 1984-08-14 |
| 4442690 | Coiler-furnace combination | Franz Hirschmanner | 1984-04-17 |