Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5928511 | Oil filter with housing drain channel | Herbert Jainek | 1999-07-27 |
| 4993517 | Oil-fill opening for introducing lubricating oil into an internal combustion engine | Rudolf Leipelt | 1991-02-19 |