Patents by Inventor Iwamasa Nishikado

Iwamasa Nishikado 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).

  • Key telephone set
    Patent number: D301031
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: May 9, 1989
    Assignees: Nitsuko Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Yoshio Sasaki, Hiroyoshi Sato, Iwamasa Nishikado, Tsuneji Kimeda
  • Telephone handset
    Patent number: D301578
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: June 13, 1989
    Assignees: Nitsuko Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Yoshio Sasaki, Hiroshi Ishizuka, Iwamasa Nishikado, Tsuneji Kimeda
  • Telephone handset
    Patent number: D309726
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: August 7, 1990
    Assignees: Nitsuko Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Yoshio Sasaki, Hiroyoshi Sato, Iwamasa Nishikado, Tsuneji Kimeda
  • Key telephone set
    Patent number: D314374
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: February 5, 1991
    Assignees: Nitsuko Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Yoshio Sasaki, Hiroshi Ishizuka, Iwamasa Nishikado, Tsuneji Kimeda