There were several glass factories over time, as well as decorating shops. All are now gone. About every old brick industrial building in Bellare was a glass works of some sort. As a kid in Bellaire, I used to ask "what was that old building" and was told it was a glass house so many times, I thought it was just a way to shut me up.
Most notable among these are the Imperial at 29th St, immediately north of Nelson Field parking lot and currently the site of the Kroger's store. The "Big I" primarily made table and decorative glassware, very highly collectable. Rodefer-Gleason Glass was primarily an industrial glass and OEM shop (making products for others). Rodefers was between Union St & the railroad tracks, between 21st & 23rd St. The one remaining building is now used by the Chevy dealer for storage, on the east side of the 4-lane "new" Route 7. The Bellaire Enamel Works is now a stamping plant on the east side of the new road, between 17th & 19th Streets.
Rodefers closed in 1977 and the Imperial closed about 1985. Hope it Helps.