Rockwell Manufacturing Co. - History | VintageMachinery.org
In 1973, Rockwell Manufacturing Company merged with North American Rockwell to become Rockwell International Corp. In 1981, the Porter-Cable line was sold to Pentair Inc. of St. Paul, MN. On April 12, 1984, the remaining machinery and tool operations were also sold to Pentair, which renamed it Delta International Machinery Corp.
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