Patents by Inventor Taichi Nagata

Taichi Nagata 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).

  • Access control system for nonvolatile memory
    Publication number: 20040186947
    Abstract: A CPU (Central Processing Unit) sets an unrewritable area in a nonvolatile memory in accordance with a program for system initialization stored in a boot ROM (Read Only Memory). An access control circuit controls permission/prohibition of rewriting based on a written flag set in the unrewritable area. This allows a system creator to freely write information which needs protection against tampering and also ensures protection against tampering of the information.
    Type: Application
    Filed: March 15, 2004
    Publication date: September 23, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Taichi Nagata, Yusuke Nemoto