Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9138839 | Piston having position rings and support rings | Christian Hold, Martin Lagler | 2015-09-22 |
| 8162325 | Multipart packing ring | Tino Lindner-Silwester, Christian Hold | 2012-04-24 |