Union Glass
From Melting Pot Wiki
Production of the Union Flint Glass Works at Pittsburgh, Pa., started in 1830 and operated by Hay & Campbell from 1831 to the 1850s. Production included: cut glass blown flint ware decanters lamps plain tablewares pressed flint ware
Two glass works at Wheeling, Va., used the name Union. Production included: bitters bottles green glass perfumers' wares vials. Union Glass Company at Somerville, Mass., made pressed glass and blanks for cutting.