Patents by Inventor Roland L. Crapo

Roland L. Crapo 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).

  • Stepping AC line voltage regulator
    Patent number: 4178539
    Abstract: A regulator for providing two different steps of bucking and two different steps of boosting correcting voltages to maintain the value of its output voltage within a selectable range with the regulator effecting each step correction for the next half-cycle based on the peak output voltage of the last half-cycle.
    Type: Grant
    Filed: August 3, 1978
    Date of Patent: December 11, 1979
    Assignee: The Superior Electric Company
    Inventor: Roland L. Crapo
  • Stepping AC line voltage regulator
    Patent number: RE31325
    Abstract: A regulator for providing two different steps of bucking and two different steps of boosting correcting voltages to maintain the value of its output voltage within a selectable range with the regulator effecting each step correction for the next half-cycle based on the peak output voltage of the last half-cycle.
    Type: Grant
    Filed: December 2, 1981
    Date of Patent: July 26, 1983
    Assignee: The Superior Electric Company
    Inventor: Roland L. Crapo