Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36274 | Method of manufacturing valve system for capacity control of a screw compressor | Jan A. Zuercher, John Q. Richardson | 1999-08-24 |
| RE36281 | Valve system for capacity control of a screw compressor and method of manufacturing such valves | Jan A. Zuercher, John Q. Richardson | 1999-08-24 |
| 5694682 | Method of manufacturing valve system for capacity control of a screw compressor | Jan A. Zuercher, John Q. Richardson | 1997-12-09 |
| 5556271 | Valve system for capacity control of a screw compressor and method of manufacturing such valves | Jan A. Zuercher, John Q. Richardson | 1996-09-17 |