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| Electro Optical Industries, Inc. (EOI) | |
| Optical Energy Technologies, Inc. | ||
| CI Systems | ||
| Thermo Gauge Instruments, Inc. | ||
| Boston Electronics Corporation | ||
| Infrared Systems Development Corporation ISDC | ||
| Isothermal Technology Limited | ||
| Thermo Oriel | ||
| Optikos Corporation | ||
| ||