Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8303191 | Multi-part axial cage for a large-diameter roller bearing | Reinhard Schwinghammer | 2012-11-06 |
| 4929752 | Process for the preparation of 1-amine-2-naphthol-4-sulfonic acid | Jurgen Beyrich | 1990-05-29 |
| 4879415 | Process for the preparation of chloronitroanilines and chloronitrophenols | Jurgen Beyrich | 1989-11-07 |
| 4348334 | Process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong's acid) | Hans-Helmut Frey, Vinzenz Habermacher, Horst Behre, Lutz Kienitz, Wolfgang Schenk +2 more | 1982-09-07 |
| 4217304 | Continuous reduction process | Hans-Helmut Frey, Vinzenz Habermacher, Paul Havalda, Georg Halfter | 1980-08-12 |