Patents by Inventor Mark J. Sebern

Mark J. Sebern 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).

  • Patent number: 4156931
    Abstract: A communications device is used for transferring data to and from a data processing system. A controller in the communications device responds to communications signals from a signal source associated with the data processing system. A standard option connection is interposed between the controller and the signal source. When an option device is to be used, a circuit board is positioned in the connection. Conductors on the circuit board control the transfer of signals between the communications device and the signal source. The option device also includes data handling circuitry that responds to signals on the conductors or that may interrupt and/or modify these signals. The board also controls an option present signal used by the communications device for control purposes.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: May 29, 1979
    Assignee: Digital Equipment Corporation
    Inventors: Arnold E. Adelman, Leonard F. Halio, Mark J. Sebern