- Valley Design Corp.
 - Provides high precision lapping, grinding, polishing and dicing of ceramics, sapphire, glass, silicon, quartz, and other hard materials. - Borges Technical Ceramics Inc
- Ceramics and hard materials machining company with experience in precision grinding R&D, prototypes, and production.
- PE Ceramic Company
- Machined ceramic parts and assemblies.
- Stratamet, Inc
- Specialists in custom machining and fabrication using advanced ceramic materials.
- A-1 Ceramic Grinding
- Offers precision machine shop grinding of ceramics for the electronic and microwave industry.
- Ferro-Ceramic Grinding, Inc.
- Offers precision machining, grinding, cutting, drilling of ceramics, ferrites, and quartz to specific needs and requirements.
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