Patents by Inventor Taizou Shirai

Taizou Shirai 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).

  • Systems and methods for content distribution including resending data
    Publication number: 20080154633
    Abstract: An information receiving apparatus receives identification information and encrypted identification information and makes a comparison between them to allow prevention of illegal utilization of contents data. Also, a data storage apparatus can record contents data encrypted by a content key and the content key so that the contents data can be reproduced on other apparatuses to improve versatility. Moreover, a management apparatus can manage the contents data in the data storage apparatus to allow other apparatuses to utilize it. And also, an information regulating apparatus can verify a signature on available data to prevent illegal utilization of the contents data. Furthermore, the data storage apparatus can store the content key, its handling policies, the contents data encrypted by the content key and its license conditions information so as to safely provide the contents data. In addition, an information recording apparatus can select favorite contents data and store it on the data storage apparatus.
    Type: Application
    Filed: February 8, 2008
    Publication date: June 26, 2008
    Inventors: Yoshihito Ishibashi, Tateo Oishi, Akihiro Muto, Jun Kitahara, Taizou Shirai
  • Systems and methods for content distribution using one or more distribution keys
    Patent number: 7353541
    Abstract: An information receiving apparatus receives identification information and encrypted identification information and makes a comparison between them to allow prevention of illegal utilization of contents data. Also, a data storage apparatus can record contents data encrypted by a content key and the content key so that the contents data can be reproduced on other apparatuses to improve versatility. Moreover, a management apparatus can manage the contents data in the data storage apparatus to allow other apparatuses to utilize it. And also, an information regulating apparatus can verify a signature on available data to prevent illegal utilization of the contents data. Furthermore, the data storage apparatus can store the content key, its handling policies, the contents data encrypted by the content key and its license conditions information so as to safely provide the contents data. In addition, an information recording apparatus can select favorite contents data and store it on the data storage apparatus.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: April 1, 2008
    Assignee: Sony Corporation
    Inventors: Yoshihito Ishibashi, Tateo Oishi, Akihiro Muto, Jun Kitahara, Taizou Shirai