Patents Represented by Attorney, Agent or Law Firm Roberta R. Wilson
  • Visual position indicator for valves with linear moving valve stem
    Patent number: 6655316
    Abstract: The present invention relates to a visual valve indicator comprised of a handle assembly with peripheral sidewalls attached to a linear moving valve stem for opening and closing of the valve and a grommet stratified into one or more color bands attached to and surrounding the base of the valve stem.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: December 2, 2003
    Inventors: Leon Kerger, Bert Pistor
  • Capless retractable marking instrument
    Patent number: D472578
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: April 1, 2003
    Inventors: Jeffrey Scott Plantz, Daniel Jay Wanhainen, Anthony J. Lammers, John W. Spirk, John R. Nottingham