Patents by Inventor Yoshihiko Hanasaki

Yoshihiko Hanasaki 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).

  • Key management apparatus, document security and editing system, and key management method
    Publication number: 20060047977
    Abstract: An objective is to provide a key management apparatus in a document security and editing system that controls and manages the usage rights of a document, allows a user with usage rights to read and edit freely according to user qualification, and manages the usage rights in compliance with document management rules established by an organization.
    Type: Application
    Filed: August 12, 2005
    Publication date: March 2, 2006
    Inventor: Yoshihiko Hanasaki