Patents by Inventor Tetsune Toyokawa

Tetsune Toyokawa 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).

  • Data processing apparatus and control circuit unit connected thereto
    Patent number: 5491789
    Abstract: A circuit board for coupling a user terminal, including a display device, to a host computer is enhanced by adding a connector, an interface circuit and a switching device which respond to a control signal to attach a display control device on the circuit board or a display control device on another computer in which the circuit board is mounted so that information from the host computer or the other computer is displayed on the display device.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: February 13, 1996
    Assignee: International Business Machines Corporation
    Inventors: Matsumi Aramaki, Yasukazu Isobe, Tetsune Toyokawa
  • Head mounted display
    Patent number: D436960
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: January 30, 2001
    Assignee: International Business Machines Corporation
    Inventors: Russell A. Budd, Derek B. Dove, Shinji Nakai, Tetsune Toyokawa