US microwave production would be hit hard by ... In January of 1991, Litton bought MPA and reopened as MenuMaster, a wholly-owned subsidiary of Litton. On April 16, 1993, employees were informed ...

the employee roster had dwindled and the Sioux Falls plant was operating under the name of Microwave Products of America. By the time the plant closed in 1992 under the Menumaster Inc. name ...