Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5437435 | Gas purging device | Lorenz Dotsch, Helmut Preyer | 1995-08-01 |
| D327387 | Tool holder | — | 1992-06-30 |
| 5005710 | Retaining device | — | 1991-04-09 |
| 4884787 | Refractory, ceramic, shaped member | Dotsch Lorenz, Jean-Louis Retrayt, Bernd Kull | 1989-12-05 |