Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8851029 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones | Brian J. Callahan, Eric P. Dion | 2014-10-07 |
| 7486179 | Low-level oil sensor | Mark Murray | 2009-02-03 |
| RE31005 | Resilient plastic piston ring | Herbert F. Prasse | 1982-08-03 |
| 4299401 | Piston ring and method of making same | — | 1981-11-10 |
| 4251599 | Ferrous metal body coated with an alloy formed by an iron/silicon extended molybdenum plasma spray powder | — | 1981-02-17 |
| 4248440 | Titania-alumina-yttria piston ring facing | — | 1981-02-03 |
| 4214762 | Rolled metal piston ring | Herbert F. Prasse, William F. Ott, Donald J. Mayhew | 1980-07-29 |
| 4203644 | Spring lock | Richard Wolpert, Alan T. Wolpert, John F. Bender | 1980-05-20 |
| 4182579 | Retaining ring | Roger L. Berkbigler | 1980-01-08 |