Patents by Inventor Ryuzo Hirabayashi

Ryuzo Hirabayashi 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).

  • Electrical plug
    Patent number: D313790
    Type: Grant
    Filed: May 29, 1987
    Date of Patent: January 15, 1991
    Assignee: MIT Inc.
    Inventor: Ryuzo Hirabayashi
  • Musical instrument digital interface plug
    Patent number: D320001
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: September 17, 1991
    Assignee: MIT, Inc.
    Inventor: Ryuzo Hirabayashi