| Business | Phone |
| Equipment Acquisition Resource 555 S Vermont St, Palatine 60067 | (847) 705-7636 |
| Lumex Inc 290 E Helen Rd, Palatine 60067 | (847) 359-2790 |
| Peregine Semiconductor 1230 W Northwest Hwy, Palatine 60067 | (847) 934-2020 |
| Power Integrations Inc 416 W Torey Pineway, Palatine 60067 | (847) 934-8611 |