Do you really have glass or china?
Are you really looking for information about a piece of china, stamped with Wellsville Glass Company. Do you know it is Wellsville, Ohio? There is also a Wellsville in NY and PA. The one in NY may have also been in the pottery / glass trade a bit. Probably other Wellsvilles other places.
I am not aware of any modern company producing glassware in Wellsville in recent times. There was a company with ACME in the name that did produce glassware a good while back. This was blown glass AFAIK. Steubenville was probably the main place that produced glass.
A good place to start is the East Liverpool Pottery Museum. They should know most of the facts for the region.
http://www.themuseumofceramics.org/pottery.html
The prime pottery in Wellsville was Sterling China but it and most other potteries are shut down. Only a few may still be in operation around East Liverpool.
Sometimes you find ware that is stamped with a name that was the shop selling it, not who actually made it. How old are the pieces?
Not much of anything left in Wellsville.
The East Liverpool area had a bunch of companies making ceramic / porcelain things other than tableware. A lot of it was for electrical devices like the tube / knob spacers or insulators.
The only other pottery in Wellsville I know of, went by something like the Ohio China ......
You don't give enough details to even know where to start. My sister might know, she knows most things about Wellsville or she probably can find out.
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Wellsville Glass Company
The Wellsville Glass Co, Wellsville Ohio
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