Patents by Inventor Thomas J. Heger

Thomas J. Heger 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).

  • Asynchronous interface message transmission using source and receive devices
    Patent number: 4451898
    Abstract: An asynchronous interface enables the transfer of information between a set of devices operating in a loop and having a wide range of operating speeds. Each device can enter a Controller active state in which it sources command frames to control the loop operation. Each device can also enter a Talker active state in which it sources Data frames on a Listener active state in which it received Data frames. The transfer of frames is coordinated by a set of handshakes which enable the frames to be transferred in an asynchronous manner.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: May 29, 1984
    Assignee: Hewlett-Packard Company
    Inventors: David W. Palermo, David W. Ricci, Joe E. Marriott, Thomas J. Heger