| Business | Phone |
| Wkm Assoc 6000 W Creek Rd, Cleveland 44131 | (216) 524-5930 |
| Eagle Tech Corp 33610 Solon Rd, Cleveland 44139 | (440) 542-0440 |
| Sansei Showa Co Ltd 31000 Bainbridge Rd, Cleveland 44139 | (440) 248-4440 |
| Hickok Electrical Instrument 10514 Dupont Ave, Cleveland 44108 | (216) 541-4467 |
| Ppm Inc 23500 Mercantile Rd # I, Cleveland 44122 | (216) 595-3200 |
| Instrumentation Systems Inc 17601 W 130th St, Cleveland 44133 | (440) 230-2007 |