Patents by Inventor George W. Deffendall

George W. Deffendall 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).

  • Patent number: 4337456
    Abstract: An analog to digital converter of the ramp-integrator type with provisions to reduce errors due to offset voltages. The cycle which is utilized includes a preconditioning cycle during which the capacitor is charged while the input to the buffer amplifier is connected to the datum level voltage, such as ground. A microprocessor is used to compute the unknown signal.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: June 29, 1982
    Assignee: Leeds & Northrup Company
    Inventors: George W. Deffendall, James J. Hitt