Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796898 | Oil scraper piston ring with elliptical oil vent holes | Bert Brauers | 1989-01-10 |
| 4756841 | Friction-reducing coating compositions and coated machine part | Ulrich Buran, Manfred Fischer, Hans-Jochem Neuhauser | 1988-07-12 |
| 4695064 | Piston ring assembly and expander | Bert Brauers | 1987-09-22 |
| 4629198 | Oil scraper piston ring assembly | Bert Brauers | 1986-12-16 |
| 4462602 | Piston ring with annular expander spring | Bert Brauers, Reiner Kierst | 1984-07-31 |
| 4448431 | Cylinder head gasket | Klaus-Peter Majewski, Dietrich Schulz | 1984-05-15 |
| 4373735 | Soft material sealing disc used as head gasket | Friedhelm Stecher, Eberhard Stocker | 1983-02-15 |
| 4201804 | Gasket impregnated with a polymerizable liquid and method for its manufacture | Friedhelm Stecher, Josef Fazekas, Paul Johren | 1980-05-06 |
| 4183544 | Multi-part piston oil ring | Paul Johren | 1980-01-15 |