Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7573000 | Power source for plasma device | George D. Blankenship, Robert L. Dodge, Todd E. Kooken | 2009-08-11 |
| 6995337 | Power source with saturable reactor | George G. Blankenship, Robert L. Dodge | 2006-02-07 |
| 6705563 | Open shipyard wire feeder | Ronald J. Sears | 2004-03-16 |
| 6268587 | Current feedback device for electric arc welder | Todd E. Kooken | 2001-07-31 |
| 6055161 | Switching type power supply for arc welding | Larry L. Church | 2000-04-25 |
| 5965040 | Plasma arc torch | William T. Matthews, David Perrin | 1999-10-12 |
| 5893985 | Plasma arc torch | William T. Matthews, David Perrin | 1999-04-13 |
| 5856647 | Drag cup for plasma arc torch | — | 1999-01-05 |
| 5726415 | Gas cooled plasma torch | Joel D. Kneisley | 1998-03-10 |
| 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 |
| 5558786 | 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 | 1996-09-24 |
| 5548097 | Plasma arc cutting torch ignition circuit and method providing a forced arc transfer function | Richard W. Couch, Jeffrey L. Peterson | 1996-08-20 |
| 5464962 | Electrode for a plasma arc torch | Richard W. Couch, Jr. | 1995-11-07 |
| 5416297 | Plasma arc torch ignition circuit and method | Jeffrey L. Peterson, David Jacob Rhodes | 1995-05-16 |
| 5414236 | Process for high quality plasma arc cutting of stainless steel and aluminum | Richard W. Couch, Jr., Nicholas A. Sanders, Zhipeng Lu | 1995-05-09 |
| 5396043 | Plasma arc cutting process and apparatus using an oxygen-rich gas shield | Richard W. Couch, Jr., Nicholas A. Sanders, John Sobr | 1995-03-07 |
| 5380976 | 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 | 1995-01-10 |
| 5317126 | Nozzle and method of operation for a plasma arc torch | Richard W. Couch, Jr., Nicholas A. Sanders, John Sobr, Patrik Backander | 1994-05-31 |
| 5310988 | Electrode for high current density plasma arc torch | Richard W. Couch, Jr., Nichols A. Sanders, Zhipeng Lu, Patrik Backander, John Sobr | 1994-05-10 |
| 5170033 | Swirl ring and flow control process for a plasma arc torch | Richard W. Couch, Jr., Nicholas A. Sanders | 1992-12-08 |
| 5166494 | Process and apparatus for reducing electrode wear in a plasma arc torch | Nicholas A. Sanders, Richard W. Couch, Jr. | 1992-11-24 |
| 5070227 | Proceses and apparatus for reducing electrode wear in a plasma arc torch | Nicholas A. Sanders, Richard W. Couch, Jr. | 1991-12-03 |