Wentworth develops and manufactures testing products for semiconductor devices. Cobra and cantilever technology probe cards, wafer and die level probing equipment.

Microphase Corporation...designers and manufacturers of innovative, high-performance microwave filters, diplexers, multiplexers, detectors, integrated assemblies, DLVAs and microwave amplifiers for telecommunications and advanced military and avionics systems.

Was Instruments Division of EDO Barnes, was KLA before that. We manufacture and service emmi and Infrascope microscopes for semiconductor failure analysis ...

Q Tran toroidial transformers power centers for low volatage lighting. Specializing in UL approved toroidial transformers Q-Tran is located in Norwalk, CT owned by John Tramaine.