|
| US4055233 | 22 Dic 1975 | 25 Oct 1977 | Electronic Engineering Co. of California | Ear coupler |
| US4122841 | 17 Jun 1977 | 31 Oct 1978 | American Electromedics Corporation | Probe tip |
| US4474182 | 5 Oct 1981 | 2 Oct 1984 | | Surgical Stoma Tool and methods of making and using the same |
| US4490857 | 12 Oct 1982 | 1 Ene 1985 | | Band earplug |
| US4804362 | 28 Dic 1987 | 14 Feb 1989 | | Ear cleaning stick provided with ear cleaning portions including a double stop abutment |
| US4867149 | 16 Dic 1989 | 19 Sep 1989 | Cabot Corporation | Earplugs |
| US4896679 | 22 May 1989 | 30 Ene 1990 | | Method and apparatus for the exclusion of sound and water from the auditory canal |
| US5031219 | 15 Sep 1988 | 9 Jul 1991 | Epic Corporation | Apparatus and method for conveying amplified sound to the ear |
| US5074375 | 10 Ago 1990 | 24 Dic 1991 | | Hearing protection system assembly |
| US5153387 | 31 Dic 1990 | 6 Oct 1992 | Syracuse University | Layered earplug |
| US5467784 | 16 Ago 1994 | 21 Nov 1995 | | Pressure-regulating ear plug |
| US5819745 | 24 Oct 1997 | 13 Oct 1998 | House Ear Institute | Pressure-regulating ear plug |
| US5957136 | 8 Oct 1998 | 28 Sep 1999 | Moldex-Metric, Inc. | Earplug |
| US5988313 | 11 Dic 1997 | 23 Nov 1999 | Dalloz Safety AB | Earplug |
| US6148821 | 29 Abr 1998 | 21 Nov 2000 | Cabot Safety Intermediate Corporation | Selective nonlinear attenuating earplug |
| US6568394 | 16 Oct 2001 | 27 May 2003 | Cabot Safety Intermediate Corporation | Flanged earplug |
| US6695093 | 13 Ene 2000 | 24 Feb 2004 | Aearo Company | Earplug |
| US6772854 | 25 Mar 2002 | 10 Ago 2004 | Shure Incorporated | Device and method for inserting acoustic dampers into earphones |
| US7192544 | 9 Sep 2004 | 20 Mar 2007 | Howard Leight Industries, LLC | Earplug with molded-in stiffener |
| US7490629 | 14 Sep 2006 | 17 Feb 2009 | | Plug kit |
| US7697706 | 3 Nov 2003 | 13 Abr 2010 | 3M Innovative Properties Company | Low sound attenuating hearing protection device |
| US7727433 | 17 Feb 2006 | 1 Jun 2010 | 3M Innovative Properties Company | Hearing protective device and method of making the same |
| US7731487 | 17 Feb 2006 | 8 Jun 2010 | 3M Innovative Properties Company | Mold for forming a hearing protective device |
| US7984716 | 22 Jun 2007 | 26 Jul 2011 | Kimberly-Clark Worldwide Inc. | Self-conforming sound attenuation earplug |
| US8113207 | 22 Ago 2008 | 14 Feb 2012 | Kimberly-Clark Worldwide, Inc. | Self-conforming sound attenuation earplug |
| USD253723 | 6 Feb 1978 | 18 Dic 1979 | | Ear plug |
| USD427304 | 8 Oct 1998 | 27 Jun 2000 | Moldex-Metric, Inc | Earplug |
| USD434139 | 17 Sep 1999 | 21 Nov 2000 | 3M Innovative Properties Company | Earplug |
| USD436164 | 17 Sep 1999 | 9 Ene 2001 | 3M Innovative Properties Company | Earplug |
| USD472627 | 16 Oct 2001 | 1 Abr 2003 | Cabot Safety Intermediate Corporation | Earplug |
| USD591732 | 23 Jul 2008 | 5 May 2009 | Burton Technologies, LLC | Earbud adapter |
| USD592300 | 4 Sep 2008 | 12 May 2009 | | Earplug |
| USD632678 | 2 Abr 2010 | 15 Feb 2011 | 3M Innovative Properties Company | Ear bud shaft and taper |