| Business | Phone |
| D B Control 1120 Auburn St, Fremont 94538 | (510) 656-2325 |
| Digital Power Corp 41920 Christy St, Fremont 94538 | (510) 657-2635 |
| E-Tech Power Group 42285 Osgood Rd, Fremont 94539 | (925) 931-1538 |
| Fuji Hi-Tech 47520 Westinghouse Dr, Fremont 94539 | (510) 651-0811 |