|
| US4969457 | 29 Sep 1989 | 13 Nov 1990 | Tecnol, Inc. | Body fluids barrier mask |
| US5322061 | 16 Dec 1992 | 21 Jun 1994 | Tecnol Medical Products, Inc. | Disposable aerosol mask |
| US5553608 | 20 Jul 1994 | 10 Sep 1996 | Tecnol Medical Products, Inc. | Face mask with enhanced seal and method |
| US5699792 | 9 Oct 1996 | 23 Dec 1997 | Tecnol Medical Products, Inc. | Face mask with enhanced facial seal |
| US5704349 | 21 Oct 1994 | 6 Jan 1998 | Tecnol Medical Products, Inc. | Surgical face mask with darkened glare-reducing strip and visor |
| US5724677 | 8 Mar 1996 | 10 Mar 1998 | Minnesota Mining and Manufacturing Company | Multi-part headband and respirator mask assembly and process for making same |
| US5724964 | 6 Jul 1995 | 10 Mar 1998 | Tecnol Medical Products, Inc. | Disposable face mask with enhanced fluid barrier |
| US5765556 | 17 Jul 1995 | 16 Jun 1998 | Tecnol Medical Products, Inc. | Disposable aerosol mask with face shield |
| US6070579 | 8 Mar 1996 | 6 Jun 2000 | 3M Innovative Properties Company | Elastomeric composite headband |
| US6123077 | 8 Mar 1996 | 26 Sep 2000 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US6148817 | 23 Jan 1998 | 21 Nov 2000 | 3M Innovative Properties Company | Multi-part headband and respirator mask assembly and process for making same |
| US6484722 | 12 Apr 2001 | 26 Nov 2002 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US6536434 | 14 Aug 2000 | 25 Mar 2003 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US6568392 | 22 Dec 1998 | 27 May 2003 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US6715489 | 19 Sep 2002 | 6 Apr 2004 | 3M Innovative Properties Company | Processes for preparing flat-folded personal respiratory protection devices |
| US6722366 | 25 Mar 2003 | 20 Apr 2004 | 3M Innovative Properties Company | Method of making a flat-folded personal respiratory protection device |
| US6886563 | 11 Mar 2004 | 3 May 2005 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US7069930 | 28 Feb 2005 | 4 Jul 2006 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US8146594 | 17 Dec 2009 | 3 Apr 2012 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices |
| USD424688 | 7 Nov 1997 | 9 May 2000 | 3M Innovative Properties Company | Respiratory protection mask |
| USD431647 | 6 Sep 1996 | 3 Oct 2000 | 3M Innovative Properties Company | Personal respiratory protection device having an exhalation valve |
| USD449377 | 9 May 2000 | 16 Oct 2001 | 3M Innovative Properties Company | Tabs on a personal respiratory protection device |
| USD458364 | 5 May 1999 | 4 Jun 2002 | 3M Innovative Properties Company | Personal respiratory protection device that has left and right tabs |
| USD459471 | 5 May 1999 | 25 Jun 2002 | 3M Innovative Properties Company | Personal respiratory protection device that has a three panelled look |
| USD620104 | 25 Nov 1996 | 20 Jul 2010 | 3M Innovative Properties Company | Personal respiratory protection device |
