| | KEMA-Powertest Inc (Chalfont, PA) Testing laboratory for electronic power equipment | |
| | Kesner, C R Co (Geneva, IL) Electronic stimulation & therapeutic equipment | |
| | Kyrotech Inc (Northbrook, IL) Electronic timing equipment | |
| | Lumedyne Inc (Port Richey, FL) Manufactures electronic photographic equipment | |
| | Manix Manufacturing Inc (Huntingdon Vly, PA) Electronic lead forming equipment & surface mount technology; convection reflow ovens | |
| | 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 | |
| | Nielsen-Kellerman Co Inc (Chester, PA) Electronic monitoring equipment for weather & water sports | |
| | 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 | |
| | Powers Process Controls (Buffalo Grove, IL) Manufacturer 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 | |
| | RAM Systems & Communications (Wauconda, IL) Electronic broadcast studio equipment | |
| | Raytheon Systems Co (Fort Wayne, IN) Industrial & defense electronic equipment | |
