|
| US4221216 | 6 Mar 1978 | 9 Sep 1980 | Robertshaw Controls Company | Emergency escape breathing apparatus |
| US4233970 | 16 Nov 1978 | 18 Nov 1980 | Robertshaw Controls Company | Emergency escape breathing apparatus |
| US4466432 | 16 Sep 1981 | 21 Ago 1984 | Mine Safety Appliances Co. | Air supplying hood |
| US4484575 | 13 Ene 1983 | 27 Nov 1984 | E. D. Bullard Company | Loose fitting supplied air respirator hood |
| US5020533 | 8 Nov 1988 | 4 Jun 1991 | Tecnol, Inc. | Face mask with liquid and glare resistant visor |
| US5150703 | 25 Feb 1991 | 29 Sep 1992 | Tecnol Medical Products, Inc. | Liquid shield visor for a surgical mask with a bottom notch to reduce glare |
| US5383450 | 19 May 1992 | 24 Ene 1995 | TCNL Technologies, Inc. | Liquid shield visor for a surgical mask |
| US5699792 | 9 Oct 1996 | 23 Dic 1997 | Tecnol Medical Products, Inc. | Face mask with enhanced facial seal |
| US5704349 | 21 Oct 1994 | 6 Ene 1998 | Tecnol Medical Products, Inc. | Surgical face mask with darkened glare-reducing strip and visor |
| US6463589 | 20 Dic 2001 | 15 Oct 2002 | | Smoke-proof headgear |
| US6510850 | 8 Nov 2000 | 28 Ene 2003 | Mallinckrodt Inc. | Emergency breathing apparatus incorporating gas storage vessel comprising a polymeric container system for pressurized fluids |
| US7104264 | 26 Mar 2004 | 12 Sep 2006 | 3M Innovative Properties Company | Rigid air ducting for respirator hoods and helmets |
| US7156093 | 21 Ene 2004 | 2 Ene 2007 | E. D. Bullard Company | Inflatable respirator hood |
| US8020552 | 26 Feb 2007 | 20 Sep 2011 | Microtek Medical, Inc. | Helmets and methods of making and using the same |
