Patents by Inventor Sadao Iizuka

Sadao Iizuka 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).

  • Optical pickup device and manufacturing method thereof
    Patent number: 7672197
    Abstract: An optical pickup device having a lens through which light transmits, a holder to which the lens is mounted, a position adjusting member which is mounted on the holder, and a housing to which the holder is mounted has a structure to allow adjustment of a mounting position of a lens assembly formed by mounting the lens and the position adjusting member on the holder when the lens assembly is assembled in the housing. In this manner, the lens can be mounted to the housing with high precision.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: March 2, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Chikashi Yoshinaga, Sadao Iizuka, Yasuhide Kogo
  • Optical pickup device
    Patent number: 7508746
    Abstract: An optical pickup device comprises a light emitting element which emits laser light, a photodetector which monitors a state of the laser light emitted from the light emitting element and applies feedback to a control of the light emitting element, and a reflect mirror which allows a portion of the laser light emitted from the light emitting element to be irradiated to the photodetector, wherein a rough surface portion is provided on a surface of the reflect mirror to avoid an erroneous operation of the optical pickup device.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: March 24, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hiroyuki Negishi, Sadao Iizuka, Minoru Sato
  • Optical pickup device
    Publication number: 20060062101
    Abstract: An optical pickup device comprises a light emitting element which emits laser light, a photodetector which monitors a state of the laser light emitted from the light emitting element and applies feedback to a control of the light emitting element, and a reflect mirror which allows a portion of the laser light emitted from the light emitting element to be irradiated to the photodetector, wherein a rough surface portion is provided on a surface of the reflect mirror to avoid an erroneous operation of the optical pickup device.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 23, 2006
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Hiroyuki Negishi, Sadao Iizuka, Minoru Sato
  • Optical pickup device and manufacturing method thereof
    Publication number: 20060007799
    Abstract: An optical pickup device having a lens through which light transmits, a holder to which the lens is mounted, a position adjusting member which is mounted on the holder, and a housing to which the holder is mounted has a structure to allow adjustment of a mounting position of a lens assembly formed by mounting the lens and the position adjusting member on the holder when the lens assembly is assembled in the housing. In this manner, the lens can be mounted to the housing with high precision.
    Type: Application
    Filed: July 6, 2005
    Publication date: January 12, 2006
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Chikashi Yoshinaga, Sadao Iizuka, Yasuhide Kogo
  • Production of magnetic powder
    Patent number: 4447264
    Abstract: Acicular magnetic powder consisting essentially of acicular iron particles which have a high coercive force and a high saturation flux density. These particles are doped and additionally contain at least one metal selected from the group consisting of cobalt, nickel, manganese and antimony and are produced in accordance with a process which provides finely divided acicular iron particle products.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: May 8, 1984
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Shintaro Suzuki, Sadao Iizuka, Yoshimi Moriya
  • Production of magnetic powder
    Patent number: 4404024
    Abstract: The magnetic characteristics of magnetic powder consisting mainly of iron are improved by pre-treating the starting material from which the magnetic powder is prepared by reduction, with an aqueous solution and/or suspension of one member selected from the group consisting of cobalt, nickel, manganese and antimony compounds and mixtures thereof.
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: September 13, 1983
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Shintaro Suzuki, Sadao Iizuka, Yoshimi Moriya
  • Production of magnetic powder
    Patent number: 4384892
    Abstract: The magnetic characteristics of magnetic powder consisting mainly of iron are improved by pre-treating the starting material from which the magnetic powder is prepared by reductions, with an aqueous solution and/or suspension of one member selected from the group consisting of zinc, chromium and copper compounds and mixtures thereof.
    Type: Grant
    Filed: February 11, 1981
    Date of Patent: May 24, 1983
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Shintaro Suzuki, Sadao Iizuka, Yoshimi Moriya, Yuichi Omote
  • Production of magnetic powder
    Patent number: 4306921
    Abstract: The magnetic characteristics of magnetic powder consisting mainly of iron are improved by pre-treating the starting material from which the magnetic powder is prepared by reduction, with an aqueous solution and/or suspension of one member selected from the group consisting of cobalt, nickel, manganese and antimony compounds and mixtures thereof.
    Type: Grant
    Filed: March 7, 1979
    Date of Patent: December 22, 1981
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Shintaro Suzuki, Sadao Iizuka, Yoshimi Moriya
  • Production of magnetic powder
    Patent number: 4274865
    Abstract: The magnetic characteristics of magnetic powder consisting mainly of iron are improved by pre-treating the starting material from which the magnetic powder is prepared by reductions, with an aqueous solution and/or suspension of one member selected from the group consisting of zinc, chromium and copper compounds and mixtures thereof.
    Type: Grant
    Filed: March 7, 1979
    Date of Patent: June 23, 1981
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Shintaro Suzuki, Sadao Iizuka, Yoshimi Moriya, Yuichi Omote