Line Material

Company Geneology

Date Company Name Event
  Line Material Company Company founded
1949 McGraw Electric Company Line Material Company acquired by McGraw Electric Company
1957 McGraw-Edison Company Company name change

Cooper Industries
Cooper Power Systems, subsidiary

Cooper Industries merged with McGraw-Edison and acquired ownership in 1985.



Before the Ohio Environmental Protection Agency. In the Matter of Cooper Power Systems Inc. and Cooper Industries, Inc. Director's Final Findings and Orders. Administrative Orders on Consent. November 20, 1998.