Citada por|
| US4856118 | 11 Feb 1987 | 15 Ago 1989 | Bose Corporation | Headphone cushioning | | US5009228 | 26 Jun 1989 | 23 Abr 1991 | | Device for relieving ear pain | | US5138722 | 2 Jul 1991 | 18 Ago 1992 | David Clark Company Inc. | Headset ear seal | | US5590213 | 15 Feb 1995 | 31 Dic 1996 | David Clark Company Inc. | Headset with adjustable headpad | | US5647377 | 19 Mar 1996 | 15 Jul 1997 | | Noise suppressor apparatus | | US5911314 | 31 Mar 1998 | 15 Jun 1999 | David Clark Company Inc. | Headset ear seal | | US6611963 | 26 Oct 2001 | 2 Sep 2003 | Bacon USA Safety, Inc. | Wire band earmuff | | USD298670 | 9 Jun 1986 | 22 Nov 1988 | Leif Palmaer | Hearing protector | | USD391575 | 21 Abr 1995 | 3 Mar 1998 | David Clark Company Inc. | Headset earcup | | USD398309 | 18 Abr 1996 | 15 Sep 1998 | David Clark Company Inc. | Headset |
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