Patents by Inventor Hirohiko Kizu

Hirohiko Kizu 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).

  • Method and apparatus allowing hot replacement of circuit boards
    Patent number: 5638289
    Abstract: A circuit board that can be replaced or removed for repair from an information processing device, and which can be reinstalled without allowing backup-mode power to reach circuits on the circuit board during reinstallation. The circuit board for the information processing device includes a load that is mounted on the circuit board and that is supplied with normal or backup power. A switch is coupled to the load and has a first state that allows the backup power to be supplied to the load and a second state in which the backup power is inhibited from being applied to the load when either normal power is supplied to the load or no power is supplied to the circuit board.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: June 10, 1997
    Assignee: Fujitsu Limited
    Inventors: Yuichi Yamada, Hirohiko Kizu