Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10697543 | Sliding element, in particular piston ring, and method for producing the same | — | 2020-06-30 |
| 10370755 | Method for producing piston a ring | Ralf Lammers, Yurly Ivanov | 2019-08-06 |
| 10000840 | Piston ring for internal combustion engines | Manfred Fischer, Ralf Lammers, Steffen Hoppe | 2018-06-19 |
| 9915346 | Piston ring | Ralf Lammers, Manfred Fischer, Jörg Vetter | 2018-03-13 |
| 9598763 | Piston ring for internal combustion engines | Manfred Fischer, Ralf Lammers, Steffen Hoppe | 2017-03-21 |
| 9447490 | Piston ring | Steffen Hoppe, Manfred Fischer, Ralf Lammers | 2016-09-20 |
| 8273469 | Piston ring | Steffen Hoppe, Manfred Fischer, Ralf Lammers | 2012-09-25 |
| 8201831 | Sliding element, in particular piston ring, method for manufacturing a sliding element, sliding system and coating for a sliding element | Steffen Hoppe, Manfred Fischer, Ralf Lammers, Manfred Muller, Reiner Waller +1 more | 2012-06-19 |