Patents by Inventor David Leon Ray

David Leon Ray 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).

  • Hierarchical key management system for digital rights management and associated methods
    Patent number: 9876991
    Abstract: An intermediate server (104) is operable in a distributed key management system (300). The intermediate server comprises one or more processors (205) and an intermediate key material repository (302) to store digital rights management key material. The intermediate server can be operable in the system between a master server (101) and a local server (106), with the local server to deliver content (108) to one or more subscriber devices (109,110). The intermediate server, or optionally a management system (117) can pre-populate the intermediate key material repository with one or key material (1005) corresponding to fragments (1001) of the content prior to the fragments of content being requested by the one or more subscriber devices.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: January 23, 2018
    Assignee: Concurrent Computer Corporation
    Inventors: David Leon Ray, James Wesley Bell