| | Manix Manufacturing Inc (Huntingdon Vly, PA) Electronic lead forming equipment & surface mount technology; convection reflow ovens | |
| | Marshall Elevator Co (Pittsburgh, PA) Elevators & electronic equipment | |
| | Matrix Automation Inc (Huron, OH) Electronic control systems, panels & testing equipment | |
| | Medical Research Laboratories (Buffalo Grove, IL) Research & development: laboratories; electronic cardiac resuscitation & physiological monitoring equipment | |
| | Monolithic Industries Inc (Woodridge, IL) Electronic test equipment | |
| | Nielsen-Kellerman Co Inc (Chester, PA) Electronic monitoring equipment for weather & water sports | |
| | Omega Mechanical Design Inc (Bluffton, OH) Custom household appliance production equipment; electronic engineering & designing service | |
| | Parker Voltage Surpressor (Lake City, MI) Electronic & lightning protection equipment & voltage surge suppressors | |
| | Peterson Electro-Musical Prdts (Alsip, IL) Manufactures electronic tuners & pipe organ equipment | |
| | Photo-Tron Corp (Rochester Hills, MI) Printed circuit board design, production & assembly, customized electronic equipment, mylar overlays, membrane & tactile keypads | |
| | Power Products Inc (Sharon Hill, PA) Special electrical & electronic equipment | |
| | Powers Process Controls (Skokie, IL) Manufactures temperature, pressure, safety & electronic controls, thermostatic shower valves & plumbing equipment | |
| | Pratt & Whitney Auto-Air Inc (Lansing, MI) Gas turbine engine composite components, airframe & electronic components & test related ground support equipment | |
| | Premier Farnell Corp (Cleveland, OH) Fasteners, welding equipment & supplies, automotive replacement electronic components | |
| | Process Systems Inc (Nokomis, IL) Mechanical & electronic rigid PVC compounding equipment assembling | |
