Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843698 | Process for the production of a cast piston upper part of a two-part piston | Hanspeter Wieland | 1989-07-04 |
| 4843952 | Low-height articulated piston with skirt-overhanging guide portions on head | — | 1989-07-04 |