Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6245138 | Pigment preparations useful for ink-jet printing | Dirk Pfutzenreuter, Rolf Richter, Fritz Puchner, Karin Hassenruck | 2001-06-12 |
| 6077339 | Pigment preparations useful for ink-jet printing | Dirk Pfutzenreuter, Rolf Richter, Fritz Puchner, Karin Hassenruck | 2000-06-20 |
| 5855662 | Aqueous pigment preparations | Achim Brand, Josef Leitermann, Klaus Schubert, Erhard Schuffenhauer, Karlheinz Wieser +1 more | 1999-01-05 |
| 4838917 | Process and apparatus for the production of very fine mineral fibers, in particular glass fibers | Wolfram Wagner, Dirk Berkenhaus, Hans-Theo van Pey | 1989-06-13 |