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Patent applications and USPTO patent grants for Tong; Hongjun.The latest application filed is for "ac pulse arc welding method".
Patent | Date |
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AC pulse arc welding method Grant 7,235,760 - Tong , et al. June 26, 2 | 2007-06-26 |
Pulse arc welding output control method and arc length variation pulse arc welding output control method Grant 7,145,101 - Tong December 5, 2 | 2006-12-05 |
AC pulse arc welding method App 20050284854 - Tong, Hongjun ;   et al. | 2005-12-29 |
Pulse arc welding output control method and arc length variation pulse arc welding output control method App 20050056630 - Tong, Hongjun | 2005-03-17 |
Method and apparatus for controlling AC pulse arc welding and welding power source apparatus Grant 6,600,135 - Tong July 29, 2 | 2003-07-29 |
Method and apparatus for controlling AC pulse arc welding and welding power source apparatus App 20020030043 - Tong, Hongjun | 2002-03-14 |
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