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Patentes

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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US39859603 Mar 197512 Oct 1976Bell Telephone Laboratories, IncorporatedStereophonic sound reproduction with acoustically matched receiver units effecting flat frequency response at a listener's eardrums
US48076129 Nov 198728 Feb 1989Industrial Research Products, Inc.Passive ear protector
US485217728 Ago 198625 Jul 1989SenseSonics, Inc.High fidelity earphone and hearing aid
US536344418 Ene 19948 Nov 1994Jabra CorporationUnidirectional ear microphone and method
US58126597 Jun 199522 Sep 1998Jabra CorporationEar microphone with enhanced sensitivity
US641172211 May 200025 Jun 2002Earphone for an RF transmitting device
US64806128 Jun 200112 Nov 2002Koryo Industrial Co., Ltd.Holder-ring for earphone plug
US67417196 Mar 200125 May 2004Meditron ASHead phone
US707607610 Sep 200211 Jul 2006Vivatone Hearing Systems, LLCHearing aid system
US772024510 Jul 200818 May 2010Auditory Licensing Company, LLCHearing aid system
US775158018 Dic 20026 Jul 2010Auditory Licensing Company, LLCOpen ear hearing aid system
USD61193412 Mar 200916 Mar 2010SJS & Sons, Inc.Audio headset

Dibujos