Patents by Inventor An D. Nguyen

An D. Nguyen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080080727
    Abstract: An in-wall speaker system having at least one pair of active transducers mounted in a wall section. The active transducers may be mounted in at least one enclosure. Each active transducer has a sound radiating surface. Each active transducer is also mounted substantially perpendicular to a surface of the wall section with the sound radiating surfaces substantially parallel to each other. The sound radiating surfaces may be facing each other or away from each other. The in-wall speaker system may also include one or more pairs of passive radiators to generate sound from sound pressure generated by the active transducers. The pairs of speakers in the wall section may be mounted vertically or horizontally within the wall, with a slot or a vent at the opening at the space between the speaker pairs.
    Type: Application
    Filed: September 30, 2006
    Publication date: April 3, 2008
    Inventors: Timothy Prenta, An D. Nguyen, Charles Sprinkle
  • Patent number: 7280668
    Abstract: This invention provides a method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and where the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) that is at least about 1 mil. thick. The invention further provides for a loudspeaker diaphragm, where the diaphragm is a composite material formed of at least two layers of ceramic material having a metal substrate therebetween and where the thickness of the metal substrate is no more than 86% of the thickness of the composite material.
    Type: Grant
    Filed: January 7, 2002
    Date of Patent: October 9, 2007
    Assignee: Harman International Industries, Incorporated
    Inventors: Allan O. Devantier, An D. Nguyen
  • Publication number: 20020141610
    Abstract: This invention provides a method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and where the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) that is at least about 1 mil. thick. The invention further provides for a loudspeaker diaphragm, where the diaphragm is a composite material formed of at least two layers of ceramic material having a metal substrate therebetween and where the thickness of the metal substrate is no more than 86% of the thickness of the composite material.
    Type: Application
    Filed: January 7, 2002
    Publication date: October 3, 2002
    Applicant: Harman International Industries, Incorporated
    Inventors: Allan O. Devantier, An D. Nguyen
  • Patent number: 6404897
    Abstract: A method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and wherein the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) which is at least about 1 mil. thick.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: June 11, 2002
    Assignee: Harman International Industries, Inc.
    Inventors: Allan O. Devantier, An D. Nguyen
  • Patent number: 6327372
    Abstract: A speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate with the percentage ratio of the thickness of the ceramic layers to the light metal substrate being in the range of from about 10% to 45% for each ceramic layer and a corresponding 80% to 10% for the lightweight metal substrate.
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: December 4, 2001
    Assignee: Harman International Industries Incorporated
    Inventors: Allan O. Devantier, An D. Nguyen
  • Patent number: D538791
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: March 20, 2007
    Assignee: Harman International Industries, Incorporated
    Inventors: An D. Nguyen, Charles M. Sprinkle
  • Patent number: D542780
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: May 15, 2007
    Assignee: Harman International Industries, Incorporated
    Inventors: An D. Nguyen, Charles M. Sprinkle