Patents by Inventor David Borthwick

David Borthwick 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).

  • Communications system with direct access mailbox
    Publication number: 20070168428
    Abstract: A communication system (1) in which a user (A) can elect to leave a message directly in the mailbox (11a) of another user (B) without calling or disturbing user (B). A store (database 7) is generated and maintained which identifies those users who are allowed direct access to the mailbox of user (B). The store is automatically updated whenever user (B) sends a communication to other users.
    Type: Application
    Filed: December 10, 2004
    Publication date: July 19, 2007
    Inventors: David Clift, John Johnston, Robert Claxton, David Borthwick