Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880765 | Process for producing carbon molecular sieves | Ferdinand Tarnow, Heinrich Heimbach | 1989-11-14 |
| 4855116 | Activated coke method of removing nitrogen oxides from exhaust gases | Ekkehard Richter, Harald Juntgen, Hans-Jurgen Schmidt | 1989-08-08 |