Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373646 | Process and apparatus for drying material to be dried | Georg Zimmermann | 1994-12-20 |
| 5366673 | Method of autoclaving porous piece-goods especially moulded bodies of porous concrete | Georg Beckmann, Georg Zimmermann | 1994-11-22 |
| 5344621 | Autoclave for treating charged materials | George Beckmann, Georg Zimmermann | 1994-09-06 |