Potomac Photonics, Inc.
Manufactures laser machine tools for high precision micromanufacturing and provides contract services, including process development, prototyping and production runs.
Lumitek International, Inc.
Manufactures custom photonics products: sensor cards, electroluminescent (EL) lamps, and laser protection devices.
Patapsco Designs, Inc.
Custom design and contract manufacturing of electronic assemblies.
Schonstedt Instrument Company
Manufactures devices used for the detection of hidden ferrous targets, buried pipes and cables; also a line of geological laboratory instruments.
Electronics research and development firm.
Bradley Broadcast and Pro Audio
Catalog and mail-order distributor of audio and transmission equipment for broadcast users.