Patents by Inventor Hisakazu Mukai

Hisakazu Mukai 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).

  • Apparatus for accessing an information storage device having defective memory cells
    Patent number: 4051460
    Abstract: An information storage device comprising an information storage unit consisting of a plurality of memory blocks each consisting of a plurality of memory cells, and means for storing therein the address information uniquely corresponding to said memory blocks including some inoperative memory blocks, whereby when the address information uniquely corresponding to a desired memory block is entered, said address information may be modified with the information stored in said means so that one of the memory blocks not including an inoperative memory cell may be selected.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: September 27, 1977
    Assignee: Nippon Telegraph and Telephone Public Corporation
    Inventors: Shinichiro Yamada, Akira Ishida, Hisakazu Mukai