Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679838 | Prevention of or reduction in the formation of amines and N-nitrosamines during the manufacture and use of elastomers | Gunter Stein | 1997-10-21 |
| 5658990 | Prevention of or reduction in the formation of amines and N-nitrosamines during the manufacture and use of elastomers | Gunter Stein | 1997-08-19 |
| 5630980 | Process of making a seal with grooved surface | G unter Stein | 1997-05-20 |
| 4334687 | Shaft seal with multi-slitted sleeve | Helmut Holzer | 1982-06-15 |
| 4298203 | Two part shaft sealing ring | Helmut Holzer | 1981-11-03 |