Austin Powder Company
Baker Hughes Mining tools
C&B Warehouse
Charter, Inc.
DM&IR
Dynamat
Eloranta & Associates Inc.
Ensign-Bickford Company
EVTAC Mining Company
Hibbing Taconite company
Hoover construction
Instantel inc.
Ispat Inland Mining
Mesabi Powder Company
Minnesota Explosives
National Steel Pellet Company
Nobel Insurance Services
Northshore Mining
Pepin-Ireco
Skillings Mining Reveiw
Smith Tool
Superior Rockbit Company
Taconite Aviation
Tread Corp. Vibra-Tech Engineers, inc. Tread Corporation
US Steel - Minntac
Vibra-Tech
Viking Explosives
White Industrial Seismology
WipWare Inc