Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821689 | Valve drive with a hydraulic transmission and a characteristic variable by means of a link control | Gabriel Tittizer | 1989-04-18 |
| 4799462 | Hydraulic valve drive for internal combustion engines | Gabriel Tittizer | 1989-01-24 |