Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5158008 | Light plunger piston for internal combustion engines | Emil Ripberger | 1992-10-27 |
| 5048398 | Single, light-weight and low friction light-metal piston for internal-combustion engines | Horst Pfeiffenberger, Emil Ripberger | 1991-09-17 |
| 4669366 | Aluminum plunger piston with thermal expansion regulating strip, for internal combustion engines | Horst Pfeiffenberger, Emil Ripberger | 1987-06-02 |
| 4599935 | Plunger piston for internal combustion engines | Horst Pfeiffenberger | 1986-07-15 |
| 4346646 | Piston for internal combustion engines | — | 1982-08-31 |