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- East Liverpool, OH
Hall China Co.
- Newell, WV
Homer Laughlin China Co.
Edwin M. Knowles China Co.
- Chester, WV
Taylor Smith & Taylor China Co.
Harker Pottery Co.
- Salem, OH
Salem China Co.
- Sebring, OH
Sebring Pottery Co.
American Limoges China Co.
Royal China Co.
Sterling China Co.
(not Sterling of Wellsville, OH)
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- Minerva, OH
Cronin China Co.
- Cambridge, OH
Universal Potteries, Inc.
- Paden City, WV
Paden City Pottery Co.
- Parkersburg, WV
- Wheeling, WV
- Morgantown, WV
- Washington, PA
- Pittsburgh, PA
- Beaver, PA
- East Palestine, OH
W.S. George Pottery Co.
- Steubenville, OH
Steubenville Pottery Co.
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