Patents by Inventor Paul L. Herbert

Paul L. Herbert 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).

  • Synchronized thyristor firing control
    Patent number: 5138205
    Abstract: The invention pertains to electrical power control more particularly to a class of circuitry known as thyristor phase control. The novel circuit can be used to control heating devices, electrical motors and generators and many other types of equipment that require a precise control of the output of a thyristor.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: August 11, 1992
    Inventor: Paul L. Herbert