| Business | Phone |
| Budzar Industries 38241 Willoughby Pkwy, Willoughby 44094 | (440) 918-0505 |
| P C Industrial Controls 38005 Apollo Pkwy # 4, Willoughby 44094 | (440) 269-3881 |
| Tri-Tech Research Inc 34099 Melinz Pkwy, Willoughby 44095 | (440) 946-6122 |
| Zicon Inc 38445 Berkshire Hills Dr, Willoughby 44094 | (440) 946-6720 |