Patents Assigned to Huwood-Irwin Co.
  • Mine car truck
    Patent number: D251901
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: May 22, 1979
    Assignee: Huwood-Irwin Co.
    Inventor: Joseph L. O'Lear
  • Truck for a rail traversing car
    Patent number: D284560
    Type: Grant
    Filed: April 21, 1983
    Date of Patent: July 8, 1986
    Assignee: Huwood-Irwin Co.
    Inventor: Joseph L. O'Lear