Issued Patents All Time
Showing 25 most recent of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE46925 | Composite electrode for a plasma arc torch | David J. Cook, Kirk H. Ferland, Charles M. Hackett, Yong Yang, Zhipeng Lu | 2018-06-26 |
| 7659488 | Composite electrode for a plasma arc torch | David J. Cook, Kirk H. Ferland, Charles M. Hackett, Yong Yang, Zhipeng Lu | 2010-02-09 |
| 7049540 | Process and apparatus for cutting or welding a workpiece | Nicholas A. Sanders, Yong Yang, Zhipeng Lu, Robert C. Dean, Jr., Charles M. Hackett | 2006-05-23 |
| 6841754 | Composite electrode for a plasma arc torch | David J. Cook, Kirk H. Ferland, Charles M. Hackett, Young Sek Yang, Zhipeng Lu | 2005-01-11 |
| 6720518 | Process and apparatus for cutting or welding a workpiece | Nicholas A. Sanders, Yong Yang, Zhipeng Lu, Robert C. Dean, Jr., Kenneth J. Woods +3 more | 2004-04-13 |
| 6713709 | Process and apparatus for cutting or welding a workpiece | Nicholas A. Sanders, Yong Yang, Zhipeng Lu, Robert C. Dean, Jr., Kenneth J. Woods +3 more | 2004-03-30 |
| 6525291 | Process and apparatus for cutting or welding a workpiece | Nicholas A. Sanders, Yong Yang, Zhipeng Lu, Robert C. Dean, Jr., Kenneth J. Woods +3 more | 2003-02-25 |
| 6130399 | Electrode for a plasma arc torch having an improved insert configuration | Zhipeng Lu | 2000-10-10 |
| 5897795 | Integral spring consumables for plasma arc torch using blow forward contact starting system | Zhipeng Lu, Brian J. Currier | 1999-04-27 |
| 5841095 | Apparatus and method for improved assembly concentricity in a plasma arc torch | Zhipeng Lu, Jennifer Freeman | 1998-11-24 |
| 5760363 | Apparatus and method for starting and stopping a plasma arc torch used for mechanized cutting and marking applications | Elizabeth B. Hackett, Timothy M. Brewer, Zhipeng Lu | 1998-06-02 |
| 5756959 | Coolant tube for use in a liquid-cooled electrode disposed in a plasma arc torch | Jennifer Freeman, Zhipeng Lu, Roger L. Kenyon | 1998-05-26 |
| 5756960 | Detecting non-symmetrical nozzle wear in a plasma arc torch | Maciej Wlodzimierz Rogozinski, Subramania Ramakrishnan, Ashley Grant Doolette, Nicholas A. Sanders | 1998-05-26 |
| 5717187 | Plasma torch condition monitoring | Maciej Wlodzimierz Rogozinski, Subramania Ramakrishnan, Ashley Grant Doolette, Nicholas A. Sanders | 1998-02-10 |
| 5695662 | Plasma arc cutting process and apparatus using an oxygen-rich gas shield | Nicholas A. Sanders, Lifeng Luo, John Sobr | 1997-12-09 |
| 5653896 | Process for high quality plasma arc and laser cutting of stainless steel and aluminum | Nicholas A. Sanders, Zhipeng Lu, Lifeng Luo, Staffan C. O. Stenfelt | 1997-08-05 |
| 5601734 | Electrode for a plasma arc torch | Lifeng Luo | 1997-02-11 |
| 5591357 | Plasma arc cutting process and apparatus using an oxygen-rich gas shield | Nicholas A. Sanders, Lifeng Luo, John Sobr | 1997-01-07 |
| 5558786 | Process for high quality plasma arc and laser cutting of stainless steel and aluminum | Nicholas A. Sanders, Zhipeng Lu, Lifeng Luo, Staffan C. O. Stenfelt | 1996-09-24 |
| 5464962 | Electrode for a plasma arc torch | Lifeng Luo | 1995-11-07 |
| 5414236 | Process for high quality plasma arc cutting of stainless steel and aluminum | Nicholas A. Sanders, Zhipeng Lu, Lifeng Luo | 1995-05-09 |
| 5396043 | Plasma arc cutting process and apparatus using an oxygen-rich gas shield | Nicholas A. Sanders, Lifeng Luo, John Sobr | 1995-03-07 |
| 5380976 | Process for high quality plasma arc and laser cutting of stainless steel and aluminum | Nicholas A. Sanders, Zhipeng Lu, Lifeng Luo, Staffan C. O. Stenfelt | 1995-01-10 |
| 5317126 | Nozzle and method of operation for a plasma arc torch | Nicholas A. Sanders, Lifeng Luo, John Sobr, Patrik Backander | 1994-05-31 |
| 5310988 | Electrode for high current density plasma arc torch | Nichols A. Sanders, Lifeng Luo, Zhipeng Lu, Patrik Backander, John Sobr | 1994-05-10 |