|
| US4172294 | 21 Sep 1978 | 30 Oct 1979 | | Protective all-purpose helmet |
| US4422185 | 11 Jun 1980 | 27 Dic 1983 | | Welding helmet |
| US4648394 | 12 Jun 1985 | 10 Mar 1987 | Mine Safety Appliances Company | Facemask for abrasive service |
| US5062156 | 6 Dic 1990 | 5 Nov 1991 | Sellstrom Manufacturing Company | Face shield filter plate retention |
| US5163185 | 21 Jun 1991 | 17 Nov 1992 | | Helmet with interchangeable lenses |
| US5331473 | 19 Jul 1993 | 19 Jul 1994 | | Controlled reflection viewing system |
| US5477566 | 7 Feb 1995 | 26 Dic 1995 | Tricel Corporation | Helmet visor mechanism with laterally moveable visors |
| US5533206 | 23 Ago 1995 | 9 Jul 1996 | Jackson Products, Inc. | Welding helmet with removable electronic quick change cartridge |
| US6185739 | 9 Nov 1998 | 13 Feb 2001 | Comweld Group Pty. Ltd. | Light shielding helmet system |
| US6401244 | 13 Mar 2001 | 11 Jun 2002 | Sellstrom Manufacturing Co. | Welding helmet and face plate |
| US7000251 | 10 Jun 2004 | 21 Feb 2006 | Campbell Hausfeld/Scott Fetzer Company | Welding shield |
| US7284281 | 9 Feb 2005 | 23 Oct 2007 | Otos Tech Co., Ltd. | Welding helmet having cartridge coupling structure |
| USD419727 | 13 Mar 1998 | 25 Ene 2000 | Comweld Group Pty., Ltd. | Light shielding helmet |
