| Business | Phone |
| Neuro Metrix Inc 62 4th Ave, Waltham 2451 | (781) 890-9989 |
| Foster Miller Inc 350 2nd Ave, Waltham 2451 | (781) 890-3200 |
| Sona Med Corp 1250 Main St, Waltham 2451 | (781) 899-6499 |
| D & R Products 34 Edge Hill Rd, Waltham 2451 | (978) 562-4137 |
| Panametrics-N D T 48 Woerd Ave, Waltham 2453 | (781) 899-2740 |
| Nova Biomedical 200 Prospect St, Waltham 2453 | (781) 894-0800 |
| Industrial & Biomedical Sensor 1377 Main St, Waltham 2451 | (781) 891-4201 |