Patents by Inventor Per St{dot over (a)}hl

Per St{dot over (a)}hl 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).

  • Extending the DRM realm to external devices
    Patent number: 8166300
    Abstract: Disclosed is a method and a system for rendering content on external devices securely. The method comprises setting up a communication channel between a proxy rendering server of a mobile device and an external rendering server of an external device, authenticating at least the external rendering server and upon successful authentication transferring a key from the proxy rendering server to the external rendering server, transferring the content encrypted with the transferred key from the proxy rendering server to the external rendering server for rendering the content, wherein the rendering of the content is performed in one of two modes, either in a preprocessing mode or in a non-preprocessing mode, and wherein a DRM agent is only present in the mobile device.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: April 24, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ulf Björkengren, Per St{dot over (a)}hl, Magnus L. Olsson