Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5048398 | Single, light-weight and low friction light-metal piston for internal-combustion engines | Emil Ripberger, Jurgen Ellermann | 1991-09-17 |
| 4730549 | Light-metal reciprocating piston | — | 1988-03-15 |
| 4669366 | Aluminum plunger piston with thermal expansion regulating strip, for internal combustion engines | Jurgen Ellermann, Emil Ripberger | 1987-06-02 |
| 4599935 | Plunger piston for internal combustion engines | Jurgen Ellermann | 1986-07-15 |