Patents by Inventor Ronald E. Roetzer

Ronald E. Roetzer 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).

  • Method of and apparatus for the automatic diagnosis of the failure of electrical devices connected to common bus nodes and the like
    Patent number: 4459693
    Abstract: This disclosure is concerned with the automatic diagnosis of the failure of tri-state, two-state and other electrical or electronic devices or components connected to common bus nodes through the pulling of such nodes to high or low voltage state levels during the disabling of all devices connected to the common bus node(s) in order to determine if a failed device is interfering with the normal bus operation; and if so, to proceed automatically to compare parametric measurements of the failed common bus node(s) with purposefully failed selected devices, one by one, to locate the device interfering with the normal bus operation.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: July 10, 1984
    Assignee: GenRad, Inc.
    Inventors: Joseph A. Prang, Ronald E. Roetzer, Michael W. Schraeder