Since 1948, Billco Manufacturing has designed and built flat-glass fabrication equipment in Zelienople, Pennsylvania, where every machine is manufactured on-site for glass producers. Founded by Ethel Billinger, the company remains in its third generation and is known for advancing the field—from early automated cutters to its American-made Ultra Series and 24/7/365 service support.
Glenny GlassSince William Glenny founded the company in Cincinnati in 1851, Glenny Glass has built its identity around nearly two centuries of dependable service. Today, the family-owned company employs more than 110 people at its Milford, Ohio, facility and serves trade customers across five states. It is recognized as the oldest continuously operating flat glass fabricator in the United States, with IGCC and SGCC certifications supporting its work.MILFORD, OH
American Glass Machinery LLCFor more than 40 years, American Glass Machinery LLC has been a Pennsylvania-based specialist serving the flat-glass industry. From its facility near Pittsburgh, the company supplies new and reconditioned glass-processing machinery to customers in the United States and worldwide, while also providing related service.MEADVILLE, PA
Glassline CorporationSince its founding in 1970 with seven employees, Glassline Corporation has grown into a Perrysburg, Ohio machinery manufacturer known for serving the flat-glass industry. Its approximately 100,000-square-foot operation builds custom equipment for industrial customers and carries ISO 9001:2015 certification achieved in 2025.PERRYSBURG, OH
Bel Pre Glassworks, IncBel Pre Glassworks, Inc. is a family-owned glass company operating since 1974. It manufactures and fabricates custom flat-glass products, including frameless shower doors and enclosures, mirrors, painted and frosted glass, tabletops, partitions, and commercial glasswork. Its capabilities include glass polishing, beveling, sandblasting, tempering, and waterjet fabrication, serving residential and commercial customers in the Washington Metropolitan area.ROCKVILLE, MD