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Founded in Chicago in 1918 as a boiler repair shop, Hayes Mechanical is a full-service mechanical contractor serving commercial and industrial facilities. The company has grown from its family-owned beginnings into a union contractor with a 138,000-square-foot operation, while retaining deep expertise in pressure-vessel work and industrial maintenance. Hayes holds three ASME certificates and the National Board “R” stamp, and provides round-the-clock emergency support backed by a dedicated safety team.
Haygrove Limited grows berries, cherries and organic crops and designs and supplies field-scale commercial polytunnels, greenhouses, substrate gutters and associated growing systems. Its growing systems serve growers of more than 30 crops in over 50 countries.
Founded in Erie in 1954, Haysite Reinforced Plastics formulates and processes thermoset fiberglass composites for demanding insulation, corrosion-resistant and lightweight structural applications. Its 103,000-square-foot operation combines in-house material formulation, custom molding and pultrusion with a testing laboratory that can validate every product it makes. Now a member of the Isovolta Group, Haysite serves power, transportation and industrial customers in 30 countries.
Operating since the early 1990s, Hayward Laboratories is a manufacturing partner best known for producing and packaging Palmer’s products. Its East Stroudsburg operation supports the brand through laboratory work and product filling.
For more than 75 years, HAZEMAG has built a global reputation around large-scale crushing technology, with more than 75,000 machines operating worldwide. HAZEMAG North America serves aggregate and cement producers with processing equipment backed by a Uniontown, Pennsylvania, test plant where customers can evaluate their own materials on full-scale impactors.
HAZLETON OXYGEN MEDICAL EQUIPMENT INC. operates in the medical equipment manufacturing industry. The company has 2-10 employees.
HBC Packaging, previously Handelok Bag Company, has made paper bags for more than fifty years and now manufactures flexible packaging at its Pennsylvania facility. Its products serve food and non-food customers, and the company reports regular third-party audits under AIB International’s food-contact packaging standards.
Founded in 2023 from the long-running Hauhinco, DBT and Caterpillar mining-technology lineage, HBT Group manufactures integrated equipment and electrical systems for underground coal mining and tunneling. Based in Lünen, Germany, the company carries nearly 200 years of mechanized longwall experience into a global business, including a specialty in plow systems designed in-house since 1941. HBT supports its machines through in-house research, design, manufacturing and a worldwide aftermarket network.
The provided website is a Namecheap domain-parking page for the recently registered domain hddefense.com. No company products, manufacturing capabilities, services, materials, markets, or contact details are presented.
Founded in 2002, HDI Railing Systems is a Pennsylvania manufacturer known for taking architectural railing projects from early design through production and, when needed, installation. Its U.S.-made systems are used in commercial and residential buildings worldwide, with professional engineers and architect-led support helping tailor projects to their surroundings and building-code requirements.
HDX Reman is a Pennsauken, New Jersey specialist focused on keeping heavy-duty truck fleets moving through remanufactured drivetrain components. The company supplies exchange-ready units to commercial partners such as OEMs and wholesale distributors, using technical knowledge and strict quality processes to support consistent performance.
Veteran- and minority-owned HDZ Fab n Design, LLC. operates a full-service steel fabrication and welding shop in Wampum, Pennsylvania, specializing in structural steel work and custom fabrication. Its team includes steel erectors, offers CAD capabilities, and supplies and installs building materials such as bar joists and roof decking. All of the company’s welders hold AWS D1.1 certifications.
Heacock Lumber is a family sawmill dating to 1918 that produces rough-cut hardwood lumber and custom-saws logs at its Bucks County mill. The Hunsberger family has operated the sawmill since purchasing it in 1974, continuing a local tradition that includes making survey stakes and turning milling byproducts into mulch and firewood. Its timber work follows Sustainable Forestry Initiative of Pennsylvania practices, with an emphasis on long-term woodlot management rather than clearcutting.
HeadStrait Labs, founded by biomedical engineers Alyssa Theroux and Mary Squire after meeting in class, develops patient-centered emergency-transport devices for head and neck stabilization. Its EVAC-1 combines an adjustable splint with SMARTmotion sensors that track movement and provide real-time feedback, giving care teams information to support safer transport and post-event review. The Pittsburgh startup has received $225,000 in local backing since 2023 and was named a 2025 UpPrize semifinalist.
Healthcare Lighting is a specialized Acuity Brands Lighting brand founded around a singular mission: improving patient outcomes through better-designed hospital environments. It develops lighting systems for healthcare settings that help patients feel more comfortable while giving caregivers clearer control over their workspaces, including solutions compatible with nLight and nLight AIR.
Healthvine Pharma LLC develops and manufactures medicines, devices, and wellness products, including its pharmacist-formulated VitaComp Energy+Vitamins supplement. Founded in 2015, the company produces in FDA-inspected U.S. facilities using processes compliant with Good Manufacturing Practices and subjects each product to detailed quality checks. Its focus is on combining pharmaceutical research with nature-based ingredients to support everyday health and vitality.
Since 1997, family-owned Hearne Hardwoods has grown from a four-person shop into a 20-employee specialty hardwood lumber company on an 18th-century homestead in southeastern Pennsylvania. Its 50,000-plus square feet hold more than 100 domestic and exotic species, including carefully matched live-edge slabs and a substantial tonewood operation for musical-instrument makers. Rick and his son Brian travel internationally to find unusual, naturally figured woods from sustainably managed forests, while the showroom and manufacturing operation help customers choose material for projects ranging from furniture to custom flooring.
As HNI Corporation’s residential building products division, Hearth & Home Technologies is shaped by a member-owner culture and a network of U.S. locations. The company makes hearth products for homes worldwide, bringing warmth and a place for families and friends to gather.
With more than 25 years in business, Hearthside Furniture brings handcrafted solid-wood furniture to homes from its Lititz, Pennsylvania, showroom. The store works with local craftsmen and offers made-to-order choices such as wood species, finishes, and sizing, while its knowledgeable staff provides guidance and an in-house delivery team handles setup. Hearthside says it has furnished more than 7,000 homes and ships throughout the United States.
Heartland Fabrication, LLC builds inland barges at its Brownsville, Pennsylvania facility, where it also operates metal-processing and coatings businesses. The company says Heartland Fabrication began in 2005 and has grown to more than 300 employees, continuing a local boat- and barge-building heritage that dates back over 130 years. Its barges are made in the United States for transport on the nation's inland waterways.