Patents by Inventor Shigema Maeda

Shigema Maeda 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 device for data management in an optical recording medium
    Patent number: 5274617
    Abstract: A recording and reproducing device, which records and reproduces information on and from a rewritable recording medium having absolute addresses and including an information recording area wherein information entered from external devices is recorded and a Table of Contents area wherein additional address information with respect to the information recorded in the information recording area is recorded. The TOC area contains the absolute addresses of the recording positions of each information recorded in the information recording area. A display section graphically and independently displays the recorded and unrecorded ranges of the information recording area according to the absolute addresses recorded in the TOC area with respect to the recording positions of each piece of information.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: December 28, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shigeo Terashima, Toshihisa Deguchi, Kunio Kojima, Shigema Maeda