Patents by Inventor Keigo Yanagisawa

Keigo Yanagisawa 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).

  • Telephone set
    Patent number: D515063
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: February 14, 2006
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Keigo Yanagisawa, Teruaki Takigawa, Syohei Suzuki
  • Telephone set
    Patent number: D529894
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: October 10, 2006
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Keigo Yanagisawa, Teruaki Takigawa, Syohei Suzuki
  • Printer
    Patent number: D663768
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: July 17, 2012
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Keigo Yanagisawa, Toshimi Kanno, Jun Tairadate, Kimiya Yamada