METROTEL CORP. OF MINNESOTA, INC.

TELEPHONE TESTING EQUIPMENT NAMELY HAND HELD TELEPHONE TESTING UNIT TO TEST PROPER OPERATION OF A TELEPHONE LINE

DEVICE FOR LOCATING UNDERGROUND CABLES, SAID DEVICE COMPRISING A TONE SOURCE, TONE PROBE AND RECEIVER UNIT

COMMUNICATION MONITORING SETS, TEST AND MEASURING SETS FOR ELECTRONIC COMMUNICATION SYSTEMS, AND POLAR RELAY TEST SETS

TELEPHONE, TELEGRAPH AND TELETYPE APPARATUS; TRANSFORMERS; AUDIO AMPLIFIERS; INDUCTORS; ELECTRONIC COMMUNICATION SYSTEMS FOR AUDIO AND VIDEO SIGNALS, MULTIPLEXING EQUIPMENT, AND AUTOMATIC TYPING EQUIPMENT

DEVICE FOR LOCATING UNDERGROUND CABLES, SAID DEVICE COMPRISING A TONE SOURCE, TONE PROBE AND RECEIVER UNIT

Communication Monitoring Sets, Test and Measuring Sets for Electronic Communication Systems and Polar Relay Test Sets; Telephone, Telegraph and Teletype Apparatus and Accessories Therefor; Transformers; Capacitors; Radio Apparatus, Such as Radio Transmitters and Receivers, Audio Amplifiers and Loud Speakers; Inductors; Relays and Switches; Electronic Communication Systems for Audio and Video Signals