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Founded in 2002, Progressive Molding Technologies is a Medina, Ohio, precision plastic injection molding company that helps OEMs take parts from design through production. Its specialty is deep injection-molding expertise, including design-for-manufacturability support and a closely managed tooling network rather than a broad but shallow menu of services. The company uses scientific molding and real-time process monitoring, and has parts that have remained in production for more than 20 years.
Founded in 1997, Progressive Powder Coating grew from serving a local manufacturer into a Mentor-area industrial powder coater built for oversized, high-volume work. Its 300,000-square-foot facility and three production lines handle parts up to 30 feet long, with custom quality control and an average turnaround of five days or less. The company also supports manufacturers with related assembly, packing, inventory management, and drop-shipping services.
Family-owned Progressive Printers has produced commercial print marketing in Dayton since 1946, pairing traditional press craftsmanship with high-speed digital production. The company handles projects from prepress through mailing and fulfillment, and recently expanded its operation with a 28,000-square-foot warehouse addition. Its work serves local organizations as well as national brands, including Gorilla Glue, the Cleveland Cavaliers and the Denver Broncos.
From its Clyde, Ohio, shop, ProgressTAC designs and builds custom automated and robotic manufacturing systems, with particular depth in automotive glass and appliance production. Established as Progress Design and Machine in 1966, the company joined with Toledo Automated Concepts in 1990 and has operated under the ProgressTAC name since 2012. Its history includes producing its 500th glass-drilling machine in 2008, while today hundreds of its automated systems operate across the United States and 20 foreign countries.
Founded in Dayton in 1951 by brothers David and Harold Wyse, Projects Unlimited makes mission-critical electronic assemblies and wiring systems for aerospace and defense customers. Now under its third generation of family leadership, the company operates from an 85,029-square-foot U.S. facility and supports programs from prototype and legacy production through repair, overhaul and obsolescence management. Projects Unlimited is a certified small business with FAA and EASA repair-station certifications and NADCAP accreditations for printed board and cable-harness assembly.
ProKlean Services is a Brunswick, Ohio company known for combining professional restoration expertise with products designed for demanding indoor environments. It supports restoration contractors, facility managers, and environmental service professionals with practical guidance and solutions for cleaner, safer spaces.
Born from founder Paul Wireman’s racing years at Proctorville’s Riverside Dragstrip, Prolube Oil makes concentrated oil treatments and lubricants for engines and equipment. The American family-owned company has operated since 1988, developing its signature oil treatment after experimenting with friction-reducing formulas for Wireman’s own race cars. Prolube says its treatment has been used in five winning national championships across NASCAR, NHRA Pro Stock Motorcycle and JEGGS Pro Stock Truck competition.
Promerus, formed in Akron in 2001 from BFGoodrich’s Electronic Materials Group, develops advanced polymer materials for semiconductor, optoelectronic and electronic-packaging applications. As a wholly owned subsidiary of Japan’s Sumitomo Bakelite, the company conducts both research and commercial activities in polycyclic olefins, with core technology centered on tailoring polynorbornene for specific performance needs. Promerus has maintained ISO 9001 certification since 2006.
Promotional Spring traces its roots to Mound Printing, a garage-based Miamisburg shop founded in 1955, and has been shaped by Wade Riggs since he acquired it in 1984. His son Dennis later took the reins, carrying forward a people-first culture that has made the company a dependable national partner for marketers, nonprofits, and business leaders. Today, its team simplifies complex marketing execution, including multi-location campaigns, for organizations that need their messages produced and delivered reliably.
Founded in 2012 in Northwest Montana, PROOF Research makes precision rifle barrels and complete rifle systems, using aerospace-grade carbon fiber alongside traditional steel. Its Advanced Composites Division in Dayton, Ohio extends that materials expertise into high-temperature solutions for aerospace and defense programs, including the F-35 and B-2 systems. The company has more than 100 team members, including engineers, technicians, PhDs and shooting enthusiasts who field-test its products in demanding conditions.
ProPlastics specializes in custom plastic injection molding, supporting projects from in-house design guidance and tooling through quality-controlled production. Based in Sidney, Ohio, the company pairs experienced mold makers with hands-on, one-on-one customer service and is ISO 9001:2015 certified.
Founded in 1969, ProQuip is a Macedonia, Ohio manufacturer known for more than five decades of specialized industrial mixing work. Its engineers design and build custom tank agitators for process manufacturers, with particular experience in chemical production and ethanol plants, and provide support throughout the equipment’s service life.
Since 2008, ProSign Studio has made signs, vehicle graphics and wide-format printed displays for businesses and organizations across Central Ohio. The Westerville shop handles projects from design through production and installation, with in-house printing and finishing for custom work such as commercial vehicle wraps and trade-show displays. Its offerings also include personalized graduation banners featuring many local school designs.
Since 1945, privately held Prospect USA has grown from a mold shop into a Cuyahoga Falls manufacturer serving customers around the world. With more than 120 employees, the company is best known for aerospace composite work and supplies manufacturers and their Tier One and Two partners in demanding commercial and defense programs. Prospect operates under ISO 9001 and AS9100D certifications with design registration.
Prospiant designs, manufactures, and builds commercial greenhouses and controlled-environment growing facilities, providing integrated systems and ongoing support from its Cincinnati base. Formed in 2021 from Rough Brothers, Nexus Greenhouse Systems, and ThermoEnergy Solutions, the company draws on more than 180 years of combined greenhouse experience and operates manufacturing facilities in the United States and Canada. Prospiant also applies its large-part manufacturing capabilities to industrial powder coating, metal fabrication, and related finishing work.
Prospiant is a Cincinnati-based company formed in 2021 by bringing together three established greenhouse businesses, whose combined history reaches back more than 180 years. It is known for carrying controlled-environment agriculture projects from concept through construction and long-term support for commercial growers, retailers, and educational institutions. Its newer 60,000-square-foot Cincinnati facility also supports industrial powder coating work beyond the greenhouse sector.
Prospira America Corporation makes anti-vibration products for the automotive industry from its Ohio operations. Its work centers on improving vehicle safety and comfort through product innovation, backed by a company-wide emphasis on total quality management, employee ownership, and environmental responsibility.
Since 1991, Prosthetic Design, Inc. has designed and manufactured high-tech lower-limb prosthetic components and sockets from its Dayton-area facility. Working closely with sister company Dayton Artificial Limb, its integrated team uses daily clinical experience to develop and test practical solutions, including digitally scanned and 3D-printed patient-specific sockets. Its components and fabrication services are used by prosthetics professionals through a global network.
Founded in December 2012 by Aaron Moles, Prosthetix Shop provides custom prosthetic care for people with limb loss or limb difference in Greater Cincinnati, Northern Kentucky and Columbus. The practice stands apart for its patient-led approach, thorough assessments and lifelong follow-up, with patients involved in decisions about devices, rehabilitation and mobility goals. Its team also advocates for the Ertl reconstructive procedure and provides prosthetics education to local healthcare professionals.
ProTech, LLC provides plastics equipment installation, maintenance, automation support, process support, fabrication, and equipment overhauls for food, beverage, and packaging manufacturers. Its capabilities include blow-molding and injection-molding equipment support, turnkey installations, equipment moving, process piping and utilities, and custom fabrication.