Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822572 | Chemical oxygen generator | Rainer Ernst, Wolfgang Eckstein | 1989-04-18 |
| 4807614 | Protective hood | Holmer Rohling | 1989-02-28 |
| 4795611 | Indicator for the determination of chlorine gas | — | 1989-01-03 |