Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5143665 | Method of producing molds that can be washed away with water and use of such molds | Hans-Joachim Forster, Ulrich Kiefer, Jurgen Bleh | 1992-09-01 |
| 4749431 | Process for producing molds, models and tools based on hard gypsum and/or cement | Fritz Fassle, Siegmund Stadler | 1988-06-07 |