- Amplifonix, Inc
 - Philadelphia - Manufacturer of hybrid, bi-polar, and GaAs low to medium power amplifiers, switches, and voltage controlled oscillators that operate in the frequency range of KHz to 3,000 MHz. - Brick Wall
- Trenton - Surge suppression and electronic filtering/conditioning units designed for critical, non-fail protection applications.
- Electro-Tech Systems, Inc.
- Glenside - Electrostatic instrumentation, environmental control, testing laboratory and ESD consulting.
- ElectroStatics
- Harleysville
- Marlac Electronics
- Moorestown - Products include switches, cable and assemblies, resistors, capacitors, fans, and filters.
- Menard Electronics, Inc.
- Trevose - Distributor for industrial electronics.
- NEC Research Institute@
- Princeton
- Precision Sales and Equipment Inc.
- Newtown Square - Specialises in precision potentiometers, custom pot configurations, and wipers and elements.
- SIMCO Static Control
- Hatfield - Manufactures static control systems, web/sheet cleaners, and static charging equipment for industrial environments.
- Starlite Productions
- Cherry Hill - Supplier of pro audio equipment.
- Synelec USA Inc.
- North Wales - Manufacturer of high-resolution video and graphic processors, CRT projectors, videowall cubes, and various other high-resolution electronic equipment.
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