|
| US4058698 | 30 Oct 1975 | 15 Nov 1977 | | Method and apparatus for DC reverse polarity plasma-arc working of electrically conductive materials |
| US4203022 | 31 Oct 1977 | 13 May 1980 | Hypertherm, Incorporated | Method and apparatus for positioning a plasma arc cutting torch |
| US4234778 | 13 Abr 1978 | 18 Nov 1980 | U.S. Philips Corporation | Method of and welding torch for arc welding |
| US4321454 | 2 Sep 1980 | 23 Mar 1982 | U.S. Philips Corporation | Method of and welding torch for arc welding |
| US4404456 | 26 Mar 1981 | 13 Sep 1983 | | Micro-arc welding/brazing of metal to metal and metal to ceramic joints |
| US4506136 | 12 Oct 1982 | 19 Mar 1985 | Metco, Inc. | Plasma spray gun having a gas vortex producing nozzle |
| US4896016 | 24 Abr 1989 | 23 Ene 1990 | Century Mfg. Co. | Plasma arc metal cutting apparatus with actuation spring |
| US5726415 | 16 Abr 1996 | 10 Mar 1998 | The Lincoln Electric Company | Gas cooled plasma torch |
| US5893985 | 14 Mar 1997 | 13 Abr 1999 | The Lincoln Electric Company | Plasma arc torch |
| US5965040 | 2 Nov 1998 | 12 Oct 1999 | Lincoln Global, Inc. | Plasma arc torch |
| US6096992 | 29 Ene 1999 | 1 Ago 2000 | The ESAB Group, Inc. | Low current water injection nozzle and associated method |
| US7126080 | 7 Jul 2005 | 24 Oct 2006 | Thermal Dynamics Corporation | Plasma gas distributor with integral metering and flow passageways |
