Patents by Inventor Richard Ditch

Richard Ditch 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).

  • Exchange which controls M SIMs and N transceivers and method therefor
    Patent number: 6052604
    Abstract: An on-board aircraft telecommunication exchange (32) provides communication and authentication services for M subscriber identity modules (SIMs) using N transceivers (36), where M can be greater than N. Associations between SIMs (56) and transceivers (36) are established when needed. Accordingly, a pool of transceivers 36 is provided to serve the collective needs of many subscribers. A SIM based authentication process is performed (100) using a subscriber's original SIM (56). That authentication can be extended to a temporary SIM (106) that is substituted for the original SIM throughout the remainder of a flight. Alternatively, the original SIMs (56) may be locked in place and relinquished when a subscriber provides an appropriate PIN.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: April 18, 2000
    Assignee: Motorola, Inc.
    Inventors: James William Bishop, Jr., Michael Frenzer, Stephen Magee, Larry Wuensch, Nathan Miller, Richard Ditch