- Clark-MXR, Inc
 - Dexter - Ultrafast femtosecond lasers for micromachining and spectroscopy. - Horizon Sales
- Brighton - Soldering equipment and supplies.
- Laser Mechanisms, Inc.
- Farmington Hills - Laser beam delivery components and articulated arm systems for high power CO2, YAG and other wavelengths that suit all facets of industrial applications.
- Parlin Industries, Inc.
- Detroit - Printed circuit board manufacturer. Single and double-sided product as same-day prototypes or high-volume.
- Prestolite Electric Incorporated
- Ann Arbor - Manufacturer of electric DC motors, alternators, and other electro-mechanical devices.
- Spina Electric Company, Inc.
- Warren - Stock and service all major brands of electric motors, controls, drives, and apparatus.
- Venturer Electronics
- Farmington Hills - Audio and telephone products.
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