Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4411469 | Chair, particularly a data display chair | Fritz Drabert, Hans J. Edel, Bernhard Schroeder | 1983-10-25 |
| 4347218 | Apparatus for making carbon black | — | 1982-08-31 |
| 4246232 | Apparatus for making carbon black | — | 1981-01-20 |