Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889091 | Rotary valve for natural gas rotary engine | John Abraham | 1989-12-26 |
| 4788507 | Peak timeout indicator/encoder and method | David J. Mazurek | 1988-11-29 |
| 4386890 | Delivery valve assembly, especially for rotary compressors | — | 1983-06-07 |