Patents by Inventor Ralph E. Mackiewicz

Ralph E. Mackiewicz 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).

  • Non-volatile memory device for a programmable controller
    Patent number: 4713756
    Abstract: A nonvolatile memory storage device for a programmable controller to provide an archival back-up for user programs with the use of a battery or other alternate back-up power source. The device can be attached to the programmable controller using a frangible tampering indicator that will break on the removable of the device from the programmable controller.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: December 15, 1987
    Assignee: Westinghouse Electric Corp.
    Inventors: Ralph E. Mackiewicz, Michael A. Kuhn
  • Programmable controller having automatic contact line solving
    Patent number: 4623961
    Abstract: A programmable controller having a processor and a dual stack line solver for solving a reference relay ladder diagram wherein the dual stack line solver is used for solving the contact type elements found in the rungs of the reference relay ladder diagram, with the noncontact type elements being directed to the processor for solution.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: November 18, 1986
    Assignee: Westinghouse Electric Corp.
    Inventor: Ralph E. Mackiewicz