Patents by Inventor Judson F. Parker

Judson F. Parker 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).

  • Apparatus, system and method for calibrating the longitudinal accuracy of printers
    Patent number: 6128097
    Abstract: A method, system and apparatus for calibrating the longitudinal accuracy of marking devices by using a comparison of a pattern printed on the transverse scale to a pattern printed on the longitudinal scale to calibrate the longitudinal scale is disclosed. The marking device could be a strip chart recorder, a printer, a well log printer or any other marking device for which one scale is less subject to variations or error than another. The information used for the calibration may be retained for re-use.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: October 3, 2000
    Assignee: Schlumberger Technology Corporation
    Inventors: Judson F. Parker, Lee B. Metrick, John T. Morris