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Operating since 1966, Cleveland-based RAD-CON is known for its specialized work in bell-type annealing for ferrous and non-ferrous materials. The company serves metals producers around the world, helping new and existing annealing facilities improve production through equipment, software, and technical support.
Radcliffe Watts LLC is a Mansfield, Ohio company focused on making at-home phototherapy more accessible to people managing plaque psoriasis. Its Klär Lite device reflects an engineering effort centered on manufacturability, serving both individual buyers and bulk customers.
Rademaker began in 1977 as a two-person family business in a Dutch garage and now designs and builds industrial bakery machinery and complete production lines. The Culemborg-based company stands out for combining engineering with practical bakery expertise: its technologists, test bakers, and technology centres help customers develop and validate products before a line reaches production. Rademaker remains family-owned while serving bakeries internationally with tailor-made systems and long-term support.
With more than 41 years in Akron, Radial Grinding handles precision grinding and related repair work for parts ranging from small components to 134-inch-long rolls. Its temperature- and humidity-regulated quality-control room, Mitutoyo CMM inspection, and 10-year records retention support the inspection reports and documentation packages supplied with every project. The shop also offers a one-stop path through grinding and a finishing or repair operation, including TRUMPF laser marking.
Radiance Technologies began in Huntsville in 1999 with a goal of being 100% employee-owned, and that structure still defines the company as it has grown to more than 1,000 employee-owners. The company develops and supports advanced technical solutions for Department of Defense and intelligence customers, with a long-standing focus on helping turn difficult defense concepts into tested, usable capabilities. Its engineering support services are covered by ISO 9001:2015 and AS9100:2016 quality systems.
Radiant Arts, Inc. is a Beach City, Ohio fine-arts studio that designs, fabricates and installs stained-glass windows, mosaics and other architectural art glass for secular and liturgical settings. Its craftspeople also specialize in restoring aging leaded windows, adding ventilated protective glazing, and developing custom statuary in collaboration with Conrad Moroder’s studio. The team brings more than 100 years of combined experience to new commissions and the careful renewal of historic work.
RadiciGroup is an Italian industrial group producing chemical intermediates, polyamide polymers, and high-performance engineering polymers, including recycled and bio-based solutions. Its business spans Specialty Chemicals and High Performance Polymers, with production and commercial sites around the world. The group describes its Specialty Chemicals production sites as Novara, Italy, and Zeitz, Germany.
Founded in 1944, Radix Wire & Cable designs and manufactures high-temperature and fire-protective wire and cable for severe industrial environments. Based in Glenwillow, Ohio, the company develops custom engineered cable solutions for applications ranging from thermal equipment to steelmaking and oil and gas, with products rated for temperatures up to 1,000°C. Its DuraLife fire-protective cable line is certified to UL 2196 requirements, and Radix maintains ISO 9001:2015 certification.
Based in Kettering, Ohio, Radmedix develops digital radiography equipment and imaging software for human and veterinary care. Its Acuity line ranges from compact chiropractic and fully automatic medical systems to genuinely portable x-ray units, while its G4 DR panels use a glass-free flexible substrate in the 14×17 model for added durability. The company says it brings nearly three decades of clinical imaging experience and has served the veterinary market for more than 14 years, with ISO 13485 certification and support through a global distributor network.
From its Strongsville, Ohio facility, Rafter Equipment Corporation designs and builds tube and pipe mill systems, rollforming machinery, and related equipment for metal producers. Founded in 1917 as the Rafter Machine Company in New Jersey, it has supplied more than 850 machines to over 450 customers worldwide and remains one of the few manufacturers building its equipment entirely in the USA. Rafter also supports mills after installation with alignments, maintenance, training, and finishing systems.
Founded in Columbus in 1964, family-owned Rage Custom Plastics develops and manufactures injection-molded and injection stretch-blow-molded plastic products and components. From its headquarters in Hilliard, Ohio, the company supports projects from product design and prototyping through production, with four facilities across Ohio and Virginia. Its roots in engineering and prototyping remain central to how it helps customers turn early concepts into finished parts.
Founded by physicist and inventor Gary Ragner in the 1990s, Ragner Technology Corporation develops patented technologies into products such as vacuum accessories, expandable hoses and SuperBungee cords. Its story began with vacuum innovations and grew into the expandable-garden-hose technology that reshaped that market, with products later made and sold by major brands. RTC is now led by Gary alongside co-founder Robert deRochemont Jr. and operates from offices in Florida and Ohio.
Founded by electrical engineer Aaron Jones, PhD, Raider Technologies is an Oakwood, Ohio developer of mission-critical radar and RF sensing technology. The company works with defense and government customers on low-altitude sensing for dense drone threats, taking concepts through prototype development and field evaluation. Its SkySweep software turns live sensor feeds into a shared operational view for counter-UAS teams.
Rainbow Mulch makes tire-free, non-toxic playground surfacing from virgin closed-cell sponge rubber at its Ohio manufacturing plant. The rubber has been made for children’s use since 1945, and the company’s surface is ASTM F1292 tested for fall protection at three inches of depth for a 20-foot critical height. Made to order in customizable colors, it is designed for children to play in as well as on.
Rainbow Printing is a Uniontown, Ohio manufacturer whose roots reach back to 1979, when it began as a trade printer serving other local printing companies across the United States. Today, its 20,000-square-foot facility handles custom printing on specialized media for customers ranging from small libraries to federal agencies, with in-house design through die cutting and production quantities from 500 to 500,000 pieces.
Founded by John Ralston in 1896, Ralston Art Memorial creates headstones, monuments, and other engraved memorials from its shop in historic Howard, Ohio. The family-owned and operated business has remained in the Ralston family through four generations and now includes a fifth generation, while serving Knox County and Central Ohio for more than a century. It also takes on custom stone etching projects for schools and local organizations.
Since 1969, family-owned Ralston Instruments has built pressure and temperature calibration systems in Ohio, from portable test pumps to digital calibrators and connection hardware. Every product is designed, engineered, and manufactured in the United States, with in-house calibration supported by an ISO/IEC 17025:2017-accredited laboratory. Its Quick-test™ connection system is a distinctive Ralston innovation, enabling high-pressure calibration connections without wrenches or thread tape.
Founded in 1995 after beginning as a wire-mesh manufacturer in 1992, RAM Exhaust makes and exports automotive exhaust parts and related sheet-metal, tubular, wire-mesh, and stainless-steel components. The company operates five factories spanning more than 400,000 square feet and supplies customers in over 50 countries, with a North American warehouse now based in Ohio. Its history includes recognition from Faurecia and quality-management certification from TÜV SÜD.
Founded in 1974, RAM Precision Industries makes precision tooling, machined parts and components for manufacturers from its temperature-controlled 80,000-square-foot facility. The Centerville company handles projects from rapid prototypes to high-volume production, with multi-axis machining, grinding and EDM capabilities that can hold tolerances within ±30 millionths of an inch. Its work ranges from metal-container tooling to orthopedic implants and turbine components, and its medical operation is ISO 13485:2016 certified.
Founded by Ronald A. Miller in 1981, RAM Sensors manufactures industrial temperature-sensing devices, including custom designs, for customers worldwide. Now in its third generation of ownership, the Westlake company supports demanding applications across industries such as metalworking, aerospace, chemical processing and power generation. Its applications engineers help develop fit-for-purpose sensors, while its quality management system is registered to ISO 9001:2015.