Patents by Inventor Herbert I. Gefvert

Herbert I. Gefvert 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).

  • Patent number: 5850457
    Abstract: A unified loudspeaker system and method for use with a home theater stereo surround sound receiver. A plurality of binaural (dual) loudspeakers are housed in a single loudspeaker enclosure having a multiply-segmented face portion. Left and right loudspeakers are canted away from a center loudspeaker to provide more complete audio coverage of a defined listening area with audio channel separation. Six (6) equalized soundfields generated via five (5) surround sound channels from the loudspeaker enclosure configuration provide arrival times of the soundfields according to that of a live performance. Conventional two-channel stereo input sources may be combined by the system to provide desired soundfields. The preferred embodiment for a full dimensional sound field system contemplates the use of a Dolby Pro Logic AC-3 five or six channel receiver or the like as an input source.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: December 15, 1998
    Inventor: Herbert I. Gefvert
  • Patent number: 5533129
    Abstract: A unified loudspeaker system and method for use with a home theater stereo surround sound receiver. A plurality of binaural (dual) loudspeakers are housed in a single loudspeaker enclosure having a multiply-segmented face portion. Left and right loudspeakers are canted away from a center loudspeaker to provide more complete audio coverage of a defined listening area with audio channel separation. Six (6) equalized soundfields generated via five (5) surround sound channels from the loudspeaker enclosure configuration provide arrival times of the soundfields according to that of a live performance. Conventional two-channel stereo input sources may be combined by the system to provide desired soundfields. The preferred embodiment for a full dimensional sound field system contemplates the use of a Dolby Pro Logic AC-3 five or six channel receiver or the like as an input source.
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: July 2, 1996
    Inventor: Herbert I. Gefvert
  • Patent number: 4888804
    Abstract: A sound reproduction system for providing an enhanced stereophonic image within an enlarged listening area includes both a left and a right transducer enclosure, each enclosure having a main transducer array for receiving an audio channel signal and providing direct reproduction thereof, the main transducer array being directed into a listening area and having a dispersion profile which substantially defines the listening area, a boundary transducer for reproducing a frequency band-limited and 180 degree phase-shifted audio channel signal, the boundary transducer being directed at an angle of substantially 65 degrees with respect to the main transducer array, and an expansion transducer for reproducing a frequency band-limited audio channel signal, the expansion transducer being directed outwardly from the listening area, with the enclosure being adapted to provide structural support for the main transducer array, the boundary transducer and the expansion transducer and to maintain a predetermined angular rel
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: December 19, 1989
    Inventor: Herbert I. Gefvert
  • Patent number: 4502149
    Abstract: A modular high-fidelity loudspeaker system is provided for automotive applications, which system is capable of functioning both as a conventional co-axial loudspeaker unit and as separable lower-frequency and higher-frequency modules. When modules are used separately and are mounted in appropriate positions in an automobile interior, greatly enhanced stereo imaging and sound clarity result.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: February 26, 1985
    Inventor: Herbert I. Gefvert