Patents Assigned to P&D Products, Inc.
  • Lister stabilizer
    Patent number: 4142588
    Abstract: Plowshares and double moldboards which form listers are attached to shanks connected to a toolbar or frame drafted behind a towing vehicle. Rotatable stabilizing discs, or colters, are rigidly affixed to the shanks behind the moldboards and plowshares. The discs engage solid soil behind the moldboards, thereby impeding lateral movements of the plowshares and moldboards and stabilizing the listers.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: March 6, 1979
    Assignee: P&D Products, Inc.
    Inventor: Roger A. Doss