Patents Assigned to Drummond Industries
  • Ball delivery retrieval and storage system
    Patent number: D445469
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: July 24, 2001
    Assignee: Drummond Industries, Inc.
    Inventors: Kenneth W. Loerop, Matthew Gieser
  • Transparent sump pump check valve
    Patent number: D364210
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: November 14, 1995
    Assignee: Drummond Industries
    Inventors: Kenneth W. Loerop, Matthew Gieser