Patents by Inventor Nagakazu Yokoyama

Nagakazu Yokoyama 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 instrument
    Patent number: D284079
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: June 3, 1986
    Assignee: NEC Corporation
    Inventors: Toshio Kita, Masafuku Akatsu, Nagakazu Yokoyama, Takeshi Nakatani
  • Telephone instrument
    Patent number: D284188
    Type: Grant
    Filed: August 26, 1983
    Date of Patent: June 10, 1986
    Assignee: NEC Corporation
    Inventors: Hideaki Kondo, Shinsuke Kadota, Keizou Ohta, Takeshi Nakatani, Nagakazu Yokoyama
  • Digital display pager
    Patent number: D284472
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: July 1, 1986
    Assignee: NEC Corporation
    Inventors: Takeshi Nakatani, Nagakazu Yokoyama
  • Combination handset and speaker dialer telephone stand unit
    Patent number: D291561
    Type: Grant
    Filed: May 3, 1985
    Date of Patent: August 25, 1987
    Assignee: NEC Corporation
    Inventors: Yuji Nozawa, Kazuyoshi Iijima, Kazuo Komatsu, Nagakazu Yokoyama