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Founded in 1946 by a U.S. Navy engineer and a Washington, D.C., businessman, Marvel Manufacturing makes precision static-balancing equipment for aircraft rotors and propellers. Now a fourth-generation family-owned company, it developed its original flexible-suspension balancing method for military and commercial aviation and continues to support its proprietary arbor kits with recalibration and repair services from its Edmond, Oklahoma, facility.
Founded in Pittsburgh in 1969, Marvel Marking Products manufactures industrial marking devices and print-room supplies, with a particular depth in glass-marking equipment and permanent contact-printing systems. Skilled craftspeople build and support equipment used by manufacturers in the glass, packaging and plastics industries, while the company also serves as a licensed Technomark dealer for dot-peen and laser marking systems. Marvel supplies customers worldwide from its Pennsylvania operation and offers rebuilds, repairs and assessments for select Marvel and Matthews International printers.
Marvell Technology, Inc. designs data-infrastructure semiconductor solutions that move, store, process and secure data for cloud data centers, enterprises and carriers. Based in Santa Clara with offices across the globe, the company combines custom silicon and system-level connectivity with more than two decades of custom development experience. Its LiquidSecurity hardware security modules are used in Microsoft Azure and achieved NIST FIPS 140-3 Level 3 certification in 2024.
Established in 1977 by Frank Crimbchin after experience ranging from heavy-metal manufacturing to work on the first lunar camera, Marwood Machine Company builds and fabricates custom machinery and industrial components in Cabot, Pennsylvania. The company is particularly known for rebuilding and retrofitting worn or damaged equipment, while its substantial shop can handle pieces weighing up to 15 tons. Its work has ranged from gas-well bailing rigs to ultra-high-vacuum chambers and very small vacuum-industry screws.
Since 1911, Maschinenfabrik Herkules has built its identity around roll machining from its headquarters in Siegen, where about 355 employees work across a highly integrated production site. The company is best known for developing precision roll grinders for demanding industries, with its patented foundation-free Monolith™ design reflecting a practical approach to machine stability and installation. Herkules also remains involved long after delivery, supporting customers with service and modernization throughout a machine’s working life.
Started by Bruce Mason in a garage in 1982, Mason Rubber Company makes custom molded and fabricated rubber parts for demanding applications. The Trevose, Pennsylvania manufacturer works from concept and tooling through production and end-of-life runs, with particular experience troubleshooting difficult parts and producing rubber bonded to other substrates. Its quality system conforms to ISO 9001:2015 and AS9100:2016 requirements, and the company is ITAR registered.
Masonite designs and produces doors, a business the company says was founded in 1925 and built on the idea of transforming waste into useful materials. With approximately 10,700 employees worldwide and more than 60 locations, it makes residential doors intended to provide comfort, safety, security and convenience.
Eight generations of the Masser family have farmed in Pennsylvania, with roots reaching back to 1754. Today, this independent, family-owned company is known for growing potatoes in the Hegins and Lykens Valleys and supplying customers across the United States. Its long agricultural heritage is matched by a practical focus on sustainable land stewardship.
Founded by Dr. Masoud Akbarzadeh after more than 12 years of research, Philadelphia’s Massive Form develops structural designs and manufactures experimental building systems through computational design, robotics, and advanced fabrication. The firm is distinguished by its use of Polyhedral Graphic Statics, a three-dimensional geometry-based method Akbarzadeh helped develop, to create lighter structures that use less material and embodied energy. Its work ranges from long-span bridges to concrete 3D-printed construction prototypes.
Master Builders Solutions is a leading global manufacturer of concrete admixtures, underground construction products, and other innovative solutions for the construction industry. Founded in 1909 in Cleveland, Ohio, the company has grown to employ approximately 2,000 people and operates 48 production sites worldwide. With a purpose of 'Inspiring people to build better,' the company focuses on delivering value-added technologies that enhance construction material performance and reduce CO₂ emissions in concrete production. Master Builders Solutions is committed to supporting customers in addressing the challenge of decarbonising the building sector.
For nearly 40 years, Master Class Stocks has refined customer-supplied target and hunting rifle stocks in Bellwood, Pennsylvania, fitting each one to its barreled action through stocksmithing and bedding work. Its pillar-bedding methods have been proven in local, national and world championship competition, while its small-run accessories include adjustable cheekpieces and custom buttplates.
Master Terrazzo Technologies develops and manufactures U.S.-made materials for epoxy terrazzo flooring, including its Morricite system, which has been in use for more than 55 years. The Levittown company has supplied materials for more than 10 million square feet of installations worldwide, collaborating with architects, designers and installers on custom color concepts and durable architectural floors. Its work includes the terrazzo atrium and “Chain of States” rosette at Philadelphia’s Museum of the American Revolution, which received a 2018 NTMA Honor Award.
Founded in 1986, Master Woodcraft Corporation produces interior finished products, with skilled union cabinet makers supporting projects of varied size and schedule. The Washington, Pennsylvania company presents its work through commercial and institutional projects, including offices and university facilities.
Founded in 1987, Master-Lee Energy Services provides nuclear, industrial and engineering field services, along with custom tooling and specialized equipment for demanding power-generation projects. The Latrobe-based company has completed more than 1,000 commercial nuclear refueling projects and supports reactor outages, decontamination and engineered-product work through trained field teams and field-tested design expertise. Its Master-Lee Engineered Products division is particularly focused on practical tooling shaped by the needs of plant personnel.
MasterBrand Cabinets manufactures and supplies cabinetry for kitchens and bathrooms through a broad portfolio of cabinet brands and a North American dealer network. The company presents offerings spanning ready-to-assemble through custom cabinetry, with products positioned across different budgets and lifestyles.
Founded in 1985 by Mike and Kate, Mastercast Bullet Company is a family-founded producer of cast bullets whose casting operation grew from a cellar and outbuildings into a 1,300-square-foot production building. The company makes hard-cast bullets and also sells Berry’s-manufactured total-copper-jacket bullets and Dillon loading machines.
Masters Concrete produces ready-mix and precast concrete products and also offers concrete-products and rail fabrication. The company says it has served Northeast Pennsylvania and the Southern Tier of New York for about 90 years, with ready-mix concrete delivered since 1951; it operates multiple plants and identifies ready-mix concrete and concrete products as distinct business lines.
Matamatic Inc designs and manufactures soft, flexible switches and sensors. Its listed products include safety mats and several kinds of pad and bumper sensors.
Founded in 1975, MATCOR designs and manufactures cathodic protection systems and provides corrosion engineering, installation, and maintenance services for major infrastructure. Based in Chalfont, Pennsylvania, the company delivers turnkey corrosion-control projects worldwide, with U.S.-made products produced at its ISO 9001:2015-certified manufacturing facility. MATCOR is part of BrandSafway and brings nearly five decades of experience to protecting pipelines, tanks, power facilities, and other critical assets.
For more than 25 years, Philadelphia-based Material Concepts, Inc. has converted and supplied roll goods that keep cut-and-sew, printing, packaging, and industrial operations moving. The hands-on, owner-operated company has been an authorized DuPont™ Tyvek® distributor since 1999 and supports customers across the United States, Canada, and Mexico. Its 28-person team converts materials at its manufacturing and distribution center under an ISO 9001:2015 quality management system, including toll-converting work made to customer specifications.