Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9574663 | Single-piece oil control ring | Rafael Antonio Bruno, Rudolf Huegel | 2017-02-21 |
| 8876115 | Three-piece oil-control ring for an internal combustion engine | Rafael Antonio Bruno | 2014-11-04 |
| 8561998 | Nitrided piston ring resistant to the propagation of cracks | Gisela Ablas Marques, Claudinei José de Oliveira, Jan Vatavuk | 2013-10-22 |
| 8104771 | Oil-control ring for an internal combustion engine | Samantha Uehara | 2012-01-31 |
| 7252292 | Oil ring for an internal combustion engine | Renato Panelli | 2007-08-07 |