| Business | Phone |
| Independent Solutions Inc 900 Skokie Blvd 118, Northbrook 60062 | (847) 498-0500 |
| Sgs Northview Labs 1880 Holste Rd, Northbrook 60062 | (847) 564-8181 |
| Kaycor International Ltd 3611 Commercial Ave, Northbrook 60062 | (847) 564-4334 |
| Omex Technologies 3665 Woodhead Dr, Northbrook 60062 | (847) 564-0206 |