Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831899 | Hydraulic control means | — | 1989-05-23 |
| 4811631 | Shifting method for hydrodynamic-mechanical transmission | Lothar Kaspar, Manfred Kalversberg, Gerd Oberpichler, Gottfried Hagemann, Dieter Schmidt | 1989-03-14 |