| Business | Phone |
| Richardson Electronics Ltd 411 Ivy St, Glendale 91204 | (818) 409-1701 |
| American Homeland Security Svc 635 W Colorado St, Glendale 91204 | (818) 240-1604 |
| Spy Vision Technologies 1248 S Glendale Ave, Glendale 91205 | (818) 637-2271 |
| Arrow Alert Burglary Systems 1930 W Glenoaks Blvd, Glendale 91201 | (818) 557-6781 |