Engineering; Research in the field of telecommunications technology; Conducting scientific feasibility studies; Quality control for others; Product quality testing; Product quality evaluation; Calibration services; Material testing

Telecommunications transmitters; Transmitters of electronic signals; Broadband wireless equipment, namely, telecommunications base station equipment for cellular and fixed networking and communications applications; Filters for radio interference suppression; Computer-controlled apparatus for testing and measuring radio frequency signals, audio signals, not for medical purposes; Electronic products for the generation, measurement, and analysis of audio signals, namely, audio analyzers; Survey...