Patents by Inventor Hachishiro Kobayashi

Hachishiro Kobayashi 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).

  • Speaker device
    Patent number: 6801635
    Abstract: A speaker device for supplying output from an amplifier to a plurality of loud speakers through a dividing network, wherein a network coil constituting the dividing network is wound in a groove in the outer circumferential surface of a cover of a driving part of the loudspeaker. Thereby, the network coil need not be mounted on a terminal plate or the like of a speaker box as a separate part.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: October 5, 2004
    Assignee: Sony Corporation
    Inventors: Hideki Minami, Hachishiro Kobayashi, Toshio Hirosawa
  • Speaker unit
    Patent number: 6493452
    Abstract: A speaker unit includes a woofer having a diaphragm with an ellipse shape sound emitting opening, and a separate speaker having an ellipse shape diaphragm with an area smaller than that of the diaphragm of the woofer, located in front of the diaphragm of the woofer, attached to a center axis of the ellipse shape of the woofer coincident with that of the ellipse shape of the separate speaker, and emitting a sound higher in frequency than that of the woofer.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: December 10, 2002
    Assignee: Sony Corporation
    Inventors: Hiroshi Koizumi, Hachishiro Kobayashi, Hideki Minami
  • Diaphragm for use with an electro-acoustic transducer and method of producing the same
    Patent number: 5521886
    Abstract: A diaphragm for use with an electro-acoustic transducer includes a diaphragm portion, an edge portion and a supporting portion. The diaphragm portion is molded by a synthetic resin material, such as polypropylene or the like. The edge portion is molded integrally with the supporting portion by a thermoplastic synthetic resin material and provided at the outer peripheral side of the diaphragm portion. The edge portion is molded integrally with the diaphragm portion by dichromatic molding.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: May 28, 1996
    Assignees: Sony Corporation, Tanaka Kogyo Corporation Limited
    Inventors: Toshio Hirosawa, Hiroshi Koizumi, Hachishiro Kobayashi, Itaru Tanaka