Patents by Inventor Yoshino Gotoh

Yoshino Gotoh 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).

  • Optical disk reading device using both a decipher key and disk identification information for decryption
    Patent number: 6408285
    Abstract: A device for reading encrypted information from an optical disk having first and second recording areas, which device can read encrypted information recorded by a first modulation method in the first recording area, read disk identification information recorded by a second modulation method in the second recording area, and decrypt the encrypted information using both a decipher key and disk identification information unique to the optical disk.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: June 18, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mitsuaki Oshima, Yoshino Gotoh, Shinichi Tanaka, Kenji Koishi, Mitsurou Moriya, Yoshinari Takemura