Patents by Inventor Isao Ayukawa

Isao Ayukawa 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).

  • Electric shaver
    Patent number: D255166
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: May 27, 1980
    Assignee: Sharp Kabushiki Kaisha (Sharp Corp.)
    Inventors: Isao Ayukawa, Tamaki Takaoka, Teruko Hayano
  • Vacuum cleaner
    Patent number: D270298
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: August 23, 1983
    Assignee: Sharp Corporation
    Inventors: Isao Ayukawa, Sachio Yamamoto, Akira Tsukada
  • Vacuum cleaner
    Patent number: D270390
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: August 30, 1983
    Assignee: Sharp Corporation
    Inventors: Isao Ayukawa, Sachio Yamamoto, Akira Tsukada
  • Electro-magnetic induction heater
    Patent number: D285523
    Type: Grant
    Filed: February 23, 1983
    Date of Patent: September 9, 1986
    Assignee: Sharp Corporation
    Inventors: Isao Ayukawa, Hiroshi Fujii, Masakazu Sugiyama, Wataru Iwahashi
  • Coffee roaster
    Patent number: D295489
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: May 3, 1988
    Assignee: Sharp Corporation
    Inventor: Isao Ayukawa