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| Tektronix | |
| Global Specialties | ||
| Yokogawa Corp. Of America | ||
| Fluke 6920 Seaway Blvd - PO Box 9090 - Everett, WA 98206 USA - | ||
| Topward SpenceTek, Inc. | ||
| Wavetek Wandel Goltermann 1030 Swabia Court - Triangle Park, NC 27709 USA - - | ||
| Instek | ||
| Agilent Technologies | ||
| Magnavolt Technologies | ||
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