- Corrpro Companies@
- Medina
- Corporate Consulting, Service, and Instruments, Inc.
 - Akron - Provides technology, and advice to the polymer processing industry. - KAV Consulting Engineers
- Cleveland - Engineering services for industrial, commercial, institutional, municipal, and residential projects from inception to completion.
- Cleveland Crystals, Inc.
- Cleveland - Manufacturer of nonlinear and electro-optic crystals and devices.
- Wellman Friction Products
- Cleveland - Is a developer, manufacturer and marketer of friction materials used in brake, clutch and transmission components for Original Equipment producers and for Aftermarket applications.
- Seifert Companies
- Massillon - Offers design, drafting, product design, mould design, and programming services. Cad systems supported are AutoCAD, Microstation, Pro/Engineer, and MicroCadam.
- NSL Analytical Services, Inc
- Cleveland - Provides both materials and environmental testing services.
- CCAD, Inc.
- Willoughby - Offering autoCAD, autoLISP and customPOP engineering and drafting services, training, and software.
- B&C Engineering Associates, Inc.
- Akron - Engineering consultants with expertise in rotating machinery, machine health monitoring, heat transfer, fluid dynamics, vibration / acoustic analysis, computational simulation, and prototype design.
- Tracer Technologies International, Inc.
- Cleveland - Oilfield and process tracing and radiological services company.
- Noise-Busters Acoustical Products
- Rocky River - Offering acoustical products for industrial, commercial, architectural, and residential applications.
- Hanco International
- Canton - Screen heating and high voltage test equipment.
- Roberts Consultants, Inc.
- Cleveland - Provides mechanical, electrical, system, construction, CAD, and environmental engineering design services.
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