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PA
Family-owned since 1984, Laboratory Testing (LTI) is a Philadelphia-area independent laboratory known for handling mission-critical results with close owner and management oversight. It serves manufacturers and regulated industries that need dependable materials testing, calibration, and reporting, with much of the work completed at one location and rush service available when deadlines tighten. LTI’s quality credentials include A2LA ISO/IEC 17025 and Nadcap accreditation.
Founded in 1967 by urodynamics pioneer Ray Laborie, Laborie is a global medical technology company that manufactures and supplies diagnostic and therapeutic devices. It specializes in gastroenterology, urology and urogynecology, and maternal and child health, and reports a worldwide workforce of more than 1,000 people.
Founded in 2002, LabTech Group develops and manufactures laboratory analytical instruments and integrated systems that combine testing, automated sample preparation, and laboratory engineering. With research and manufacturing centers in China and the United States, its products reach more than 90 countries and serve over 30,000 customers. The group also owns the long-established LabTech CDS Analytical brand, which has specialized in thermal sample-preparation systems for more than 50 years, and acquired the Empore™ membrane-based SPE business in 2018.
Founded by athletes, Malvern-based LaceUp Athletics designs wearable weighted training gear that adds resistance to everyday movement and sport-specific practice. Its signature approach pairs LYCRA® compression sleeves with evenly distributed, flexible FLX Weights, while its training laces thread directly onto equipment such as sticks and clubs without straps or clips. The company also makes adjustable gear such as its Heavy Hat for building neck strength and stability.
Founded in 2020 by Temple University chemist Christian Schafmeister, Ladder Bio is a Blue Bell biotechnology company developing Spiroligomer™ molecules—synthetic, ladder-shaped compounds designed for targeted drug discovery. Its platform combines rational molecular design with libraries containing billions of compounds, pursuing therapeutics and diagnostic applications where conventional small molecules and biologics can fall short. Formerly known as ThirdLaw Molecular, the company has also received more than $16.9 million in non-dilutive funding from the U.S. Department of Defense and the Defense Threat Reduction Agency for biosecurity-related work.
A friend’s cookie lesson turned Carlene’s longtime cake-baking passion into a locally owned Natrona Heights bakery devoted to handmade ladylocks. She bakes the flaky, cream-filled pastries fresh daily and also takes special orders for celebrations and fundraisers.
Since 1946, LaFrance Corp has made the small but consequential parts that put a brand on a product, from custom name plates and emblems to decorative trim and functional components. Based in Concordville, Pennsylvania, the company combines industry-specific design and engineering with global manufacturing, shipping more than 200 million pieces annually to over 50 countries. LaFrance supports projects from concept through production and holds ISO 9001:2015, IATF 16949:2016, and ISO 14001:2015 certifications.
Founded by Louis A. Grant Jr., LAG Equipment designs and manufactures remote-controlled refractory tear-out and electric arc furnace maintenance machines for demanding industrial work. The Grant family brings three generations of experience to equipment built around keeping operators at a safe distance, while the company also offers maintained, operated rentals and new machine sales for refractory-consuming industries. Its machines serve steel, metals, mining and related operations in domestic and international markets.
Founded in 1980 by Donald “Butch” Greene, Lagonda Machine is a family-owned and operated machine shop in Washington, Pennsylvania, now run by the second generation. Its 26-person operation produces machined parts and provides fabrication and welding work for individuals and companies, including 24/7 emergency service.
Founded in 1950, Laird Plastics supplies plastic materials across North America and turns them into cut-to-size and custom-fabricated parts for industrial customers. Its 50-plus service centers combine local support with a broad distribution network, while a dedicated recycling business unit operates closed-loop programs that keep recovered plastics in domestic use. The company also reported recycling more than 100 million pounds of material in 2023.
Lake City Industries is a contract manufacturer specializing in precision sheet metal fabrication, assemblies, machining, and electrical switchboard assemblies. With over 50 years of experience, the company operates a 50,000-square-foot facility in suburban Erie, Pennsylvania, offering services such as powder coating, PEM hardware inserts, and laser marking. The company is ISO-certified and serves diverse industries with a focus on quality and cost-effective manufacturing.
Based in Lake City, Pennsylvania, Lake Erie Portable Screeners designs and manufactures Pitbull portable topsoil screeners and related material-handling equipment in the USA. Its lineup ranges from compact, class-3-truck-towable box screeners to the large 5700 screening plant, with grizzlies, conveyors and feeders built to support demanding jobs. The company also offers worksite demonstrations so customers can run a machine before buying.
Founded in Erie in 1961, Lake Erie Rubber & Manufacturing makes custom-molded rubber components for demanding industrial applications. The multigenerational company remains family-owned and combines in-house engineering and tooling support with more than six decades of molding experience, including work on difficult elastomers and large, high-capacity presses. Its Erie operation is ISO 9001:2015 certified and also produces specialized consumer products such as durable dog toys.
Since 1961, Lake Erie Rubber & Manufacturing has molded custom rubber components in Erie, Pennsylvania, supporting demanding OEM applications with in-house engineering and U.S.-based production. The multi-generational company was family-owned for its first two generations and remains in Erie under its current owner, pairing more than six decades of experience with ISO 9001-certified quality systems and presses up to 800 tons. Its work ranges from industrial components to durable rubber pet toys, with design, tooling, and material guidance available from concept through production.
A four-generation Erie family business dating to 1902, Lakeview Forge manufactures tight-tolerance custom closed-die forgings for applications where strength and durability matter. Its history began with plumbing tools before evolving into precision near-net forgings, including aircraft ordnance suspension lugs and other government components. Lakeview Forge operates as an ISO 9100-certified, ITAR-registered supplier, with Erie Bolt & Forging, LLC assuming its services in 2024.
In Central Pennsylvania, Lakeview Sheds & Vinyl Products LLC builds and sells customizable backyard buildings, from storage sheds and barns to portable cabins and garages. As a Backyard Outfitters-owned and operated company, it works with local family builders near its East Freedom lot and offers a 3D design tool for customers who want to shape a building around their needs. Its rent-to-own program provides month-to-month payments without a credit check, while larger double-wide garages are delivered in two sections and joined on site.
Family cheesemaking is Lamagna Cheese’s defining tradition: Giovanni Lamagna brought his Italian recipes to America in 1928, and successive generations have carried them forward. The company is known for fresh, all-natural ricotta made daily with traditional methods, while also serving foodservice customers with larger-format cheese products.
Founded in 1993, Lambda Science, Inc. is a scientific research and engineering consultancy specializing in advanced electromagnetic sensor systems, particularly radar. Its staff carries projects from physics-based performance modeling through prototype hardware evaluation, with published expertise spanning radar phenomenology, antenna systems, and advanced signal processing. All professional staff hold advanced degrees in science, engineering, or management.
Since 1911, Lamberti Group has developed and manufactured specialty and customized chemical solutions, with a particular heritage in natural polymers and applications for industries ranging from agriculture to leather and personal care. Its worldwide network of plants and laboratories links research, formulation and production, including facilities capable of reactors and blenders up to 65,000 liters. At its Trissino site, the group combines leather-finishing expertise with waterborne polymer formulations and has held ISO 9001 certification since 2013.
Since 1969, Laminar Flow Inc. has engineered and manufactured cleanroom equipment for pharmaceutical and biotech production, including custom ceiling systems and downflow booths. From its 45,000-square-foot Ivyland facility, the company builds solutions around customer requirements, with patented designs and more than 200 years of combined engineering and manufacturing experience among its employees. Its UL-recognized facility produces UL-labeled control panels and supports projects from initial design through installation and training.