ref "Centennial History of Belmont County" published in 1903
The factories now in operation are the Bellaire Bottle Co. G.S. Armstrong, president. The National Glass Mfg. Co., organized by Crangle, Dalzell & Co. of Wheeling, which is now operated and know as the Rodefer Glass Co. The Novelty Stamping Co. and the Century Glass Co., the Enterprise Enamel Co. organized by Dorer and Smith.
The last, but no means least, the Imperial Glass Co., now in the course of construction, which when completed will be one of the finest factories in the country, and will give employment to upwards of 500 men. _________________________________________________________
My college roommate worked at Rodefer Glass. This would have been a summer job in the 60's. He was older than I and a Vietnam vet. I graduated high school in '72. I lived just south of Bellaire. The only glass factory I remember was Imperial. I was given an extensive tour of the facility in 1973. By then it was a very old and worn factory. I wouldn't be surprized if most the the equipment was that which they first installed in 1903.
Do a word search on ebay, for Imperial Glass. You will find all types of glassware and variety of prices.