|
| US3974829 | 8. Juli 1974 | 17. Aug. 1976 | Giles C. Clegg, Jr. John R. Lynn | Means for preventing fogging of optical aids used by the wearer of a surgical mask |
| US4014047 | 20. Okt. 1975 | 29. März 1977 | | Face mask |
| US4323063 | 21. Apr. 1980 | 6. Apr. 1982 | | Medical face mask |
| US4635628 | 11. Sept. 1985 | 13. Jan. 1987 | Tecnol, Inc. | Surgical face mask with improved moisture barrier |
| US4827924 | 2. März 1987 | 9. Mai 1989 | Minnesota Mining and Manufacturing Company | High efficiency respirator |
| US4883547 | 1. März 1989 | 28. Nov. 1989 | Minnesota Mining and Manufacturing Company | Method of forming a high efficiency respirator |
| US4941470 | 11. Jan. 1988 | 17. Juli 1990 | Tecnol, Inc. | Face mask with ear loops and method for forming |
| US5265280 | 29. Apr. 1992 | 30. Nov. 1993 | | Facial screen with connecting elastic |
| US5303423 | 7. Juni 1991 | 19. Apr. 1994 | Splash Shield, Limited Partnership | Face shield/mask combination |
| US5322060 | 5. Mai 1993 | 21. Juni 1994 | | Fire-resistant smoke escape face masks |
| US5374458 | 15. Sept. 1993 | 20. Dez. 1994 | Minnesota Mining and Manufacturing Company | Molded, multiple-layer face mask |
| US5553608 | 20. Juli 1994 | 10. Sept. 1996 | Tecnol Medical Products, Inc. | Face mask with enhanced seal and method |
| US5676133 | 4. Juni 1996 | 14. Okt. 1997 | Apotheus Laboratories, Inc. | Expiratory scavenging method and apparatus and oxygen control system for post anesthesia care patients |
| US5699792 | 9. Okt. 1996 | 23. Dez. 1997 | Tecnol Medical Products, Inc. | Face mask with enhanced facial seal |
| US5704349 | 21. Okt. 1994 | 6. Jan. 1998 | Tecnol Medical Products, Inc. | Surgical face mask with darkened glare-reducing strip and visor |
| US5724964 | 6. Juli 1995 | 10. März 1998 | Tecnol Medical Products, Inc. | Disposable face mask with enhanced fluid barrier |
| US5740798 | 22. Okt. 1996 | 21. Apr. 1998 | | Disposable nasal band filter |
| US5765556 | 17. Juli 1995 | 16. Juni 1998 | Tecnol Medical Products, Inc. | Disposable aerosol mask with face shield |
| US5863312 | 31. Okt. 1997 | 26. Jan. 1999 | | Non-entraining filter |
| US6117515 | 30. Jan. 1998 | 12. Sept. 2000 | Kimberly-Clark Worlwide, Inc. | Non-particulating and low particulating disposable products for use in clean room environments |
| US6123077 | 8. März 1996 | 26. Sept. 2000 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US6357440 | 16. Juni 1999 | 19. März 2002 | Mallinckrodt Inc. | Pliable respiratory mask |
| US6427693 | 1. Mai 2000 | 6. Aug. 2002 | Kimberly-Clark Worldwide, Inc. | Face mask structure |
| US6474336 | 20. März 2000 | 5. Nov. 2002 | | Mini pleated face mask |
| 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. März 2003 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US6715489 | 19. Sept. 2002 | 6. Apr. 2004 | 3M Innovative Properties Company | Processes for preparing flat-folded personal respiratory protection devices |
| US6722366 | 25. März 2003 | 20. Apr. 2004 | 3M Innovative Properties Company | Method of making a flat-folded personal respiratory protection device |
| US6752149 | 25. Juli 2002 | 22. Juni 2004 | Realaid, Inc. | Nasal mask with replaceable filter |
| US6886563 | 11. März 2004 | 3. Mai 2005 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US6932094 | 6. Dez. 2002 | 23. Aug. 2005 | Nanya Technology Corporation | Slurry tank autocleaner |
| US6941949 | 19. Dez. 2002 | 13. Sept. 2005 | Kimberly-Clark Worldwide, Inc. | Disposable face mask |
| US7044131 | 18. Mai 2004 | 16. Mai 2006 | Kimberly-Clark Worldwide, Inc. | Disposable face mask |
| US7069930 | 28. Febr. 2005 | 4. Juli 2006 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices and processes for preparing same |
| US7077139 | 18. Mai 2004 | 18. Juli 2006 | Kimberly-Clark Worldwide, Inc. | Disposable face mask |
| US7086401 | 10. Febr. 2004 | 8. Aug. 2006 | Megatech Scientific Pte Ltd. | Respiratory mask with inserted spacer |
| US7171967 | 25. Apr. 2003 | 6. Febr. 2007 | Louis M. Gerson Co., Inc. | Face mask and method of manufacturing the same |
| US7845351 | 31. Aug. 2005 | 7. Dez. 2010 | Kimberly-Clark Worldwide Inc. | Germicidal face mask |
| US8029723 | 17. Juli 2007 | 4. Okt. 2011 | 3M Innovative Properties Company | Method for making shaped filtration articles |
| US8052821 | 13. Mai 2009 | 8. Nov. 2011 | | Method for manufacturing a facemask structure |
| US8146594 | 17. Dez. 2009 | 3. Apr. 2012 | 3M Innovative Properties Company | Flat-folded personal respiratory protection devices |
| USD300571 | 8. März 1985 | 4. Apr. 1989 | | Pre-shaving wrap |