[Trade Journal]
Publication: Brick and Clay Record
Chicago, IL, United States
vol. 59, no. 1, p. 44, col. 1
Large Porcelain Concerns Merge
The Jeffrey [sic] Jeffery Dewitt Co. of Detroit, Mich., recently merged with the Champion Spark Plug Co. of Toledo, Ohio. The Detroit plant, it is understood, will be operated as the Champion Porcelain Co. under the same management as before.