Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695662 | Plasma arc cutting process and apparatus using an oxygen-rich gas shield | Richard W. Couch, Jr., Nicholas A. Sanders, John Sobr | 1997-12-09 |
| 5653896 | Process for high quality plasma arc and laser cutting of stainless steel and aluminum | Richard W. Couch, Jr., Nicholas A. Sanders, Zhipeng Lu, Staffan C. O. Stenfelt | 1997-08-05 |
| 5601734 | Electrode for a plasma arc torch | Richard W. Couch, Jr. | 1997-02-11 |
| 5591357 | Plasma arc cutting process and apparatus using an oxygen-rich gas shield | Richard W. Couch, Jr., Nicholas A. Sanders, John Sobr | 1997-01-07 |