| Business | Phone |
| Wentworth Laboratories Inc 101 Commerce Dr, Brookfield 6804 | (203) 775-9311 |
| Beta Squared Lithography Inc 940 Federal Rd, Brookfield 6804 | (203) 775-4242 |
| Phototronics Inc Secor Rd, Brookfield 6804 | (203) 755-9000 |
| Photronics Inc 15 Secor Rd, Brookfield 6804 | (203) 775-9000 |