| Business | Phone |
| A P Engineering Svc 6053 Hudson Rd # 350, St Paul 55125 | (651) 739-7366 |
| Harold A Magy & Assoc Inc 1821 University Ave W # S294, St Paul 55104 | (651) 649-3618 |
| Keltech Engineering 951 County Road C2 W, St Paul 55113 | (651) 482-0073 |
| Kyber Design Inc 287 6th St E # 160, St Paul 55101 | (651) 291-5045 |