|
| US4017797 | 5 Feb 1975 | 12 Abr 1977 | Columbia Research Laboratories, Inc. | Headset for receiving and transmitting signals |
| US4023209 | 17 Dic 1975 | 17 May 1977 | Gentex Corporation | Protective helmet assembly with segmental outer shell |
| US4025734 | 27 Jul 1976 | 24 May 1977 | | Ambient noise shielded ear transceiver |
| US4087653 | 5 Nov 1976 | 2 May 1978 | Gentex Corporation | Sound attenuating earcup assembly provided with receivers and contact microphone |
| US4349081 | 8 Dic 1980 | 14 Sep 1982 | | Method for retaining a hearing aid in place and hearing aid harness |
| US4367378 | 5 Ago 1980 | 4 Ene 1983 | | Telephone and holding band therefor |
| US4796307 | 12 Mar 1987 | 10 Ene 1989 | | Ear protector |
| US5280524 | 11 May 1992 | 18 Ene 1994 | Jabra Corporation | Bone conductive ear microphone and method |
| US6499146 | 21 Dic 2001 | 31 Dic 2002 | Gray Matter Holdings LLC | Ear protection device |
| US6502247 | 18 Oct 2001 | 7 Ene 2003 | Gray Matter Holdings LLC | Apparatus and method for making an ear warmer having interior seams |
| US6502248 | 7 Nov 2001 | 7 Ene 2003 | Gray Matter Holdings LLC | Apparatus and method for making an ear warmer and an ear warmer frame |
| US6735784 | 28 Ene 2002 | 18 May 2004 | 180s, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
| US6880174 | 30 Dic 2002 | 19 Abr 2005 | 180s, Inc. | Ear protection device |
| US6920645 | 3 Ene 2003 | 26 Jul 2005 | 180s, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
| US6978483 | 9 Abr 2004 | 27 Dic 2005 | 180s, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
| US7210173 | 18 Abr 2005 | 1 May 2007 | 180s, Inc. | Ear protection device |
| US7212645 | 12 Ago 2003 | 1 May 2007 | 180s, Inc. | Ear warmer with a speaker system |
| US7222373 | 12 Ago 2003 | 29 May 2007 | 180s, Inc. | Ear warmer having a membrane forming a receptacle |
| US7614091 | 3 Ene 2007 | 10 Nov 2009 | 180s, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
| US7617543 | 6 Jun 2007 | 17 Nov 2009 | 180s, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
| US7650649 | 12 Ago 2003 | 26 Ene 2010 | 180s, Inc. | Ear warmer having an external frame |
| US7773767 | 23 Mar 2006 | 10 Ago 2010 | Vocollect, Inc. | Headset terminal with rear stability strap |
| US7885419 | 6 Feb 2006 | 8 Feb 2011 | Vocollect, Inc. | Headset terminal with speech functionality |
| US7962970 | 27 Oct 2003 | 21 Jun 2011 | 180s, Inc. | Ear warmer having a curved ear portion |
| US7996923 | 27 Dic 2005 | 16 Ago 2011 | 180s, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
| US8128422 | 5 Nov 2004 | 6 Mar 2012 | Vocollect, Inc. | Voice-directed portable terminals for wireless communication systems |
| US8130970 | 26 Abr 2006 | 6 Mar 2012 | 3m Innovative Properties Company | Ear cup |
| US8130985 | 7 Jun 2007 | 6 Mar 2012 | 3M Innovative Properties Company | Ear cup with bone conduction microphone |
| US8160287 | 22 May 2009 | 17 Abr 2012 | Vocollect, Inc. | Headset with adjustable headband |
| US8189801 | 26 Abr 2006 | 29 May 2012 | 3M Svenska Aktiebolag | Ear cup |
| US8224011 | 26 Abr 2006 | 17 Jul 2012 | 3M Innovative Properties Company | Ear cup with microphone device |
| US8243943 | 23 Nov 2004 | 14 Ago 2012 | 3M Svenska Aktiebolag | Hearing protector with removable microphone, amplifier, and loudspeaker unit |
| USD281159 | 12 May 1983 | 29 Oct 1985 | Gentex Corporation | Sound-attenuating earcups |
| USD376598 | 13 Sep 1995 | 17 Dic 1996 | Sony Corporation | Headphone combined with microphone |
| USD541482 | 12 Mar 2004 | 24 Abr 2007 | 180s, Inc. | Ear warmer having an external frame |
| USD545001 | 12 Mar 2004 | 19 Jun 2007 | 180s, Inc. | Ear warmer having an external frame |
| USD549216 | 7 Feb 2006 | 21 Ago 2007 | Vocollect, Inc. | Convertible headset |
| USD549217 | 7 Feb 2006 | 21 Ago 2007 | Vocollect, Inc. | Convertible headset |
| USD549694 | 15 Nov 2005 | 28 Ago 2007 | Vocollect, Inc. | Headset |
| USD552595 | 16 Nov 2005 | 9 Oct 2007 | Vocollect, Inc. | Control panel for a headset |
| USD567218 | 26 Jul 2007 | 22 Abr 2008 | Vocollect, Inc. | Control panel for a headset |
| USD567219 | 26 Jul 2007 | 22 Abr 2008 | Vocollect, Inc. | Headset |
| USD567799 | 26 Jul 2007 | 29 Abr 2008 | Vocollect, Inc. | Headset |
| USD567806 | 26 Jul 2007 | 29 Abr 2008 | Vocollect, Inc. | Headset |
| USD605629 | 29 Sep 2008 | 8 Dic 2009 | Vocollect, Inc. | Headset |
| USD613267 | 24 Jul 2009 | 6 Abr 2010 | Vocollect, Inc. | Headset |
| USD616419 | 24 Jul 2009 | 25 May 2010 | Vocollect, Inc. | Headset |
| USD626949 | 20 Feb 2008 | 9 Nov 2010 | Vocollect Healthcare Systems, Inc. | Body-worn mobile device |
| USD643013 | 20 Ago 2010 | 9 Ago 2011 | Vocollect Healthcare Systems, Inc. | Body-worn mobile device |
| USD643400 | 19 Ago 2010 | 16 Ago 2011 | Vocollect Healthcare Systems, Inc. | Body-worn mobile device |