| Business | Phone |
| Acoustic Zen Technologies 16736 W Bernardo Dr, San Diego 92127 | (858) 487-1988 |
| Precision Photron Inc 9520 Padgett St, San Diego 92126 | (858) 684-3555 |
| Speed Vision Technology Inc 3970 Sorrento Valley Blvd # E, San Diego 92121 | (858) 450-7107 |