Patents by Inventor Arthur Paul Pietrzyk

Arthur Paul Pietrzyk 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).

  • Programmable logic controller for safety systems with reduced cross-wiring
    Patent number: 6549034
    Abstract: A safety system programmable logic controller provides for cross connection of inputs and outputs of separate independent control modules through the use of virtual wire connections passing as messages on a single logical backplane. The backplane executes a high level protocol that provides wire-like indications of communication failures mimicking those of separate physical wires.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: April 15, 2003
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Arthur Paul Pietrzyk, Thomas Sugimoto