Patents by Inventor Shohei Ikehara

Shohei Ikehara 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 of connecting and disconnecting a board in a hot state
    Patent number: 5051606
    Abstract: A device for connecting and disconnecting a board in a hot state includes a board and a mother-board. The board has mounted thereon dynamic elements through which a low electric current flows during a clock signal disabled state, and a clock signal enable or disable circuit. When a board must be connected or disconnected in the hot state due to a fault therein, the clock circuit in the board is set to the disabled state. The board is connected or disconnected while a low current flows therethrough, after a new board is connected, the clock signal disabled state is released. Thus a connector connecting the board with the mother-board cannot be damaged by a flow of a large electric current during a connection or disconnection of the boards.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: September 24, 1991
    Assignee: Fujitsu Limited
    Inventor: Shohei Ikehara