Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6874986 | Self-tapping fastener | Michael Köppel | 2005-04-05 |
| 6818159 | Process for the production of a composite consisting of a fiber reinforced material | — | 2004-11-16 |
| 4773633 | Helical spring and process for producing it | Walter Steigleder | 1988-09-27 |
| 4665869 | Valve spring retainer and process for its production | Walter Steigleder | 1987-05-19 |
| 4572058 | Piston cylinder system, especially for internal combustion engines | Gerhard Gruninger | 1986-02-25 |
| 4466399 | Piston-cylinder set for reciprocating internal-combustion engines, especially Otto and diesel engines | Richard Kochendorfer | 1984-08-21 |