Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12158147 | Slide valve of a single screw compressor | John Michael Roll, Maghmood Van Der Poll | 2024-12-03 |
| 10605504 | External separator | John Michael Roll | 2020-03-31 |
| 10145375 | Discharge muffler | — | 2018-12-04 |
| 8702408 | Slide for use in a screw compressor | John Michael Roll, Peter Michael Woodard | 2014-04-22 |
| 7380767 | Valve | John Michael Roll, Peter Michael Woodard, Andrew Ellingham | 2008-06-03 |
| 7338263 | Method and apparatus for compressor re-manufacture | — | 2008-03-04 |
| 6113358 | Scroll compressors | John Michael Roll | 2000-09-05 |