Patents by Inventor Katsuyuki Yoshioka

Katsuyuki Yoshioka 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).

  • Memory device and a method for prohibiting writing to the memory device
    Patent number: 5355336
    Abstract: A memory device connected to a CPU and including a plurality of memory elements selectable between a writable state and an unwritable state, the CPU outputting an address signal for selecting at least one of the plurality of memory elements, data to be stored in the plurality of memory elements, and a write signal for selecting the writable state or the unwritable state of the plurality of memory elements to the memory device.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: October 11, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Katsuyuki Yoshioka