Patents by Inventor Andrew W. Rash

Andrew W. Rash 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).

  • PARALLEL REDUNDANCY PROTOCOL ERROR DETECTION
    Publication number: 20250047427
    Abstract: This disclosure pertains to systems and methods to detect network errors in a parallel redundant protocol (PRP) network. A node-level redundancy error subsystem of an intelligent electronic device (IED) maintains records (e.g., counts) of information associated with missing duplicate frames expected from node devices on the PRP network via redundant first and second local area networks (LANs). Non-zero counts of missing duplicate frames may be identified as network errors.
    Type: Application
    Filed: August 1, 2023
    Publication date: February 6, 2025
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Mauricio G. Silveira, Bharat Nalla, Rajeev Kumar Babu, David J. Dolezilek, Edson L. Hernandez Cortinas, Nishchal Sharma, Andrew W. Rash, Andrew A. Miller, Lihua Ran
  • Communication system tester and related methods
    Patent number: 11431605
    Abstract: The present disclosure relates to systems and methods for testing communication systems. In one embodiment, a communication device tester may include a traffic disciplining subsystem to generate a first stream of data packets satisfying a metric and may communicate the first stream of data packets to a test device in a first test scenario. A delay subsystem may generate a variable delay in a second stream of data packets and communicate the second stream of data packets to the test device in a second test scenario. A data corruption subsystem may corrupt a third stream of data packets and communicate the third stream of data packets to the test device in a third test scenario. A test subsystem may determine whether the test device satisfies at least one criterion of each of the first test scenario, the second test scenario, and the third test scenario.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: August 30, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Glenn C. Bethmann, Mauricio G. Silveira, Stephanie L. McDaid, Andrew W. Rash
  • COMMUNICATION SYSTEM TESTER AND RELATED METHODS
    Publication number: 20220191123
    Abstract: The present disclosure relates to systems and methods for testing communication systems. In one embodiment, a communication device tester may include a traffic disciplining subsystem to generate a first stream of data packets satisfying a metric and may communicate the first stream of data packets to a test device in a first test scenario. A delay subsystem may generate a variable delay in a second stream of data packets and communicate the second stream of data packets to the test device in a second test scenario. A data corruption subsystem may corrupt a third stream of data packets and communicate the third stream of data packets to the test device in a third test scenario. A test subsystem may determine whether the test device satisfies at least one criterion of each of the first test scenario, the second test scenario, and the third test scenario.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 16, 2022
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Glenn C. Bethmann, Mauricio G. Silveira, Stephanie L. McDaid, Andrew W. Rash