Patents by Inventor David Matthew Drysdale

David Matthew Drysdale 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).

  • Methods and systems for controlling a user device in a telecommunication network
    Patent number: 8983049
    Abstract: A method of controlling a user device in a telecommunications network having a first part and a second, different part is provided. The method includes, at the user device, receiving a first communication session setup request to set up a given communication session, the first communication session setup request being directed to a first communication interface, receiving a communication notification in relation to the same given communication session, the communication notification being directed to a second communication interface, establishing the given communication session via the first communication interface via the first part of the telecommunications network, and after having established the given communication session via the first communication interface, activating an alert function to alert a user of the user device to the availability of the second communication interface at least on the basis of having received the communication availability notification.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: March 17, 2015
    Assignee: Metaswitch Networks Ltd
    Inventors: David Matthew Drysdale, Alan Cook, Christopher John Mairs, Jonathan Thomas Rowland, Lionel James Jerome Lee, Douglas Gavin Currie