Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5437435 | Gas purging device | Karl-Heinz Hofer, Helmut Preyer | 1995-08-01 |
| 5225247 | Process for producing a gas purging plug with increased resistance to infiltration and oriented porosity | Helmut Preyer, Frich Renfordt, Jean-Louis Retrayt | 1993-07-06 |
| 5124099 | Procedure for manufacturing of fireproof ceramic molded parts | Uwe Schatz, Andreas Batton, Jens Decker, Orfwin Rave, Helmut Schuller | 1992-06-23 |
| 5102593 | Process for producing carbon-bonded refractory ceramic moldings | Helmut Schuller, Andreas Batton, Jens Decker | 1992-04-07 |
| 4944497 | Flushing block | Bernd Grabner, Josef Knauder, Hans Hoffgen | 1990-07-31 |