Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4799694 | Piston ring and method of making the same | — | 1989-01-24 |
| 4796898 | Oil scraper piston ring with elliptical oil vent holes | Martin Morsbach | 1989-01-10 |
| 4695064 | Piston ring assembly and expander | Martin Morsbach | 1987-09-22 |
| 4629198 | Oil scraper piston ring assembly | Martin Morsbach | 1986-12-16 |
| 4462602 | Piston ring with annular expander spring | Reiner Kierst, Martin Morsbach | 1984-07-31 |