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| US4850346 | 20 Oct 1986 | 25 Jul 1989 | WGM Safety Corp. | Respirator |
| US4886058 | 17 May 1988 | 12 Dic 1989 | Minnesota Mining and Manufacturing Company | Filter element |
| US6161540 | 28 Abr 1998 | 19 Dic 2000 | Cabot Safety Intermediate Corporation | Respirator filter having a pleated filter layer |
| US6345620 | 21 Dic 1998 | 12 Feb 2002 | Mine Safety Appliances Company | Flexible respirator filter |
| US6701925 | 11 Abr 2002 | 9 Mar 2004 | | Protective hood respirator |
| US8230860 | 20 May 2008 | 31 Jul 2012 | Dräger Safety AG & Co. KGaA | Filter for a breathing device |
| USD262322 | 23 Jul 1979 | 15 Dic 1981 | | Nasal cannula mouth mask |
| USD477401 | 3 Ago 2000 | 15 Jul 2003 | 3M Innovative Properties Company | Pair of filter cartridges for a powered air-purifying respirator |
| USD652506 | 2 Feb 2009 | 17 Ene 2012 | 3M Innovative Properties Company | Filter cartridge having a magenta netting |
| USD652910 | 2 Feb 2009 | 24 Ene 2012 | 3M Innovative Properties Company | Filter cartridge |
| USRE35062 | 17 Jun 1993 | 17 Oct 1995 | Minnesota Mining and Manufacturing Company | Filter element |
