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| Tri Tronics | |
| Gradient Lens Corporation | ||
| Lumex | ||
| Bivar | ||
| Physical Optics Corporation | ||
| Chicago Miniature Lamp - SLI 201 Railroad Avenue - Hackensack, NJ 07601 USA - - | ||
| Volpi Manufacturing | ||
| Stocker and Yale Inc | ||
| Endoscopy Support Services, inc. | ||
| Khatod Optoelectronic (Eurotroniks) | ||
| Lumitex, Inc. | ||
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