1. Massa: Sonar & Ultrasonic Technology 280 Lincoln St, Hingham, MA 02043 Coordinate: 42.24821,-70.91387 Phone: (781) 749-4800
2. Topsfield Engineering 75 Elm St, Hingham, MA 02043 Coordinate: 42.23682,-70.892 Phone: (781) 749-9638