Family-owned since Michael A. Doyle established it in 1975, Doyle Shamrock Industries grew from a one-person operation into a Holland, Ohio, manufacturer serving customers across the United States and beyond. The company specializes in custom plastic injection molding, with 200,000 square feet across two manufacturing locations and an off-site warehouse. Its work is backed by ISO 9001:2015 and ISO 14001:2015 certification.
ISO 9001:2015
certification
ISO 14001:2015
certification
UL94 V0 flame rating
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RoHS and REACH SVHC compliance
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NSF Certified
certification
UL-approved battery connectors
certification
Innovative Plastic Molders, IncFounded by Brian and Andrea O’Leary, Innovative Plastic Molders has spent 20 years turning product concepts into custom injection-molded plastic parts and molds. The Vandalia company combines in-house engineering and tool maintenance with a 120,000-square-foot facility and more than 30 electric presses, while also handling assembly and pack-out work. Innovative Plastic Molders is ISO 9001:2015 certified and serves customers from automotive applications to distinctive products such as its patented branded buckets.VANDALIA, OH
DEIMLING/jeliho Plastics, IncWhat began in Bill Deimling’s garage in 1976 is now a family-owned and operated plastics manufacturer in Amelia, Ohio. DEIMLING/jeliho Plastics is known for combining deep tooling experience with custom thermoplastic injection molding for customers across the Americas, Europe, and China. Its 108,000-square-foot facility and ISO 9001:2015 conformance reflect a long-running operation that has grown without losing its personal, hands-on character.AMELIA, OH
GSH IndustriesSince 1986, GSH Industries has remained a third-generation family business in Ohio, known for keeping custom manufacturing work in-house. It serves OEM customers across North America with made-to-spec plastic components, supported by 15 injection molding machines and more than 150 years of combined industry experience.STRONGSVILLE, OH
Shamrock PlasticsShamrock Plastics is a family-owned custom plastic fabrication company that turns client ideas into finished products, from design and engineering through in-house production and distribution. Founded by Tom Ruffner in Mount Vernon in 1989, it now operates in Ohio and South Carolina, with son Jay leading the Ohio location and son-in-law Nate partnering in Myrtle Beach. The company handles projects ranging from one-off prototypes to production runs, using extensive in-house CNC equipment and nearly 30 years of fabrication experience.MOUNT VERNON, OH