| Business | Phone |
| Signet Scientific 1721 Ben Crenshaw Way, Austin 78746 | (512) 306-8701 |
| Alphasonics Inc 15 Cottondale Rd, Austin 78738 | (512) 837-8088 |
| American Innovations Ltd 12112 Technology Blvd, Austin 78727 | (512) 249-3400 |
| Electro Industries Austin 78736 | (512) 288-6331 |