Patents by Inventor Ketsumi Tokuda

Ketsumi Tokuda 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).

  • TERMINAL DEVICE, SERVER DEVICE, AND CONTENT DISTRIBUTION SYSTEM
    Publication number: 20090187762
    Abstract: To provide a content distribution system which can prevent use of content which has been temporarily stored after the valid period. A content distribution system (1) including a license server (101) which issues a license, a content server (102) which transmits the content, a terminal device (103) which controls use of the content based on the issued license. The terminal device (103) does not allow the use of the received encrypted content when it is judged that the encrypted content received from the content server (102) is not the content received in real time.
    Type: Application
    Filed: July 27, 2007
    Publication date: July 23, 2009
    Inventors: Ryuichi Okamoto, Akio Higashi, Hiroki Murakami, Ketsumi Tokuda