Sound recording apparatus; Electronic test and measurement devices for use in the fields of networks and telecommunications, namely, instrumentation used to test and certify new and existing data and voice communication cable and coaxial cable; Telecommunications and data networking hardware, namely, devices for transporting and aggregating voice, data, and video communications across multiple network infrastructures and communications protocols; Vibration sensors; Echo sounders; Sonars; Digital voice signal processors
Electrical and Scientific Apparatus