Patents by Inventor Masafuku Akatsu

Masafuku Akatsu 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
  • Key telephone set with speakerphone and visual display panel
    Patent number: D298939
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: December 13, 1988
    Assignee: NEC Corporation
    Inventors: Kenichi Morikawa, Masafuku Akatsu, Tatsuya Kato, Seizo Ohta, Takeshi Nakatani