Patents by Inventor Jonathon R. Engdahl

Jonathon R. Engdahl 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).

  • Intelligent network interface circuit
    Patent number: 5153884
    Abstract: An interface circuit couples a host processor in an industrial control system to a local area communications network. In includes a protocol machine for receiving and transmitting messages on the network and an interface controller which is programmed to implement one or more protocols. As a message is received by the protocol machine, the interface controller anticipates a responsive message which it writes to the protocol machine even as the message is being received. If the message is received accurately, the responsive message is transmitted without delay.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: October 6, 1992
    Assignee: Allen-Bradley Company, Inc.
    Inventors: Mark A. Lucak, Jonathon R. Engdahl, Michael T. Klein