Patents by Inventor Ellen F. Mason

Ellen F. Mason 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).

  • Chromatograph
    Patent number: D422925
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: April 18, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Michael David Glaser, James Ward Baker, Roger A. Brown, Ellen F. Mason, Thomas E. Price, Thomas M. Przybylski, Robert P. Rhodes, George P. Walsh, William H. Wilson