Patents Assigned to Ritchie Engineering Company
  • Refrigerant recovery system case
    Patent number: D449842
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: October 30, 2001
    Assignee: Ritchie Engineering Company
    Inventors: Robert Borre, Ajit Ramachandran, Neil T. Amundsen, Joseph J. Schachtner