| Business | Phone |
| Essex Medical Group Inc Po Box 464, Burlington 1803 | (781) 860-9404 |
| Guidant Corp 15 New England Executive Park, Burlington 1803 | (781) 273-7300 |
| Radionics 22 Terry Ave, Burlington 1803 | (781) 272-1233 |
| Cosman Co Inc 76 Cambridge St, Burlington 1803 | (781) 272-6561 |
| Delphi Medical Systems 35 Corporate Dr # 497, Burlington 1803 | (781) 685-2958 |