| Vectron International
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| Manufactures and markets frequency-generation and control products, including crystals and crystal oscillators, SAW filters, and clock and data recovery products. |
| West Crystal Company Ltd
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| Manufacture of precision quartz crystals, custom made to specifications. From Canada. |
| Young Shin Quartz
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| Quartz glass for semiconductor and optical fiber business. |
| Advanced Analogic Technologies Inc
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| Maker of analog and power semiconductors, such as power MOSFETs and power management ICs. |
