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Ascent Capital Group, Inc., through its subsidiary, Monitronics International, Inc., provides security alarm monitoring services to residential and commercial customers in the United States, Canada, the District of Columbia, and Puerto Rico. The company provides monitoring services for alarm signals arising from burglaries, fires, medical alerts, and other events through security systems at customers' premises. It also offers home automation services, including remote activation and control of security systems, support for video monitoring, flood sensors, automated garage door and door lock capabilities, and thermostat integration; hands-free two-way interactive voice communication between its monitoring center and customers; and customer service and technical support related to home monitoring systems and home automation services. The company also provides maintenance and wholesale contract monitoring services to other security alarm companies. It markets and sells its products through a network of authorized dealers. The company was formerly known as Ascent Media Corporation and changed its name to Ascent Capital Group, Inc. in July 2011. Ascent Capital Group, Inc. was incorporated in 2008 and is based in Greenwood Village, Colorado.

Kelso Technologies Inc. develops, produces, and distributes proprietary equipment used in transportation applications in the United States and Canada. It offers rail and road transport equipment, such as pressure relief, vacuum relief, bottom outlet, pressure car pressure relief, pressure car angle, and top ball valves; and one-bolt manways and related equipment, emergency response equipment, and no spill locomotive fueling equipment; and other specialty valves, parts, equipment, and services. The company was formerly known as Kelso Resources Ltd. and changed its name to Kelso Technologies Inc. in July 1994. Kelso Technologies Inc. was incorporated in 1987 and is headquartered in Surrey, Canada.

Tel-Instrument Electronics Corp. designs, manufactures, and sells avionics test and measurement solutions for the commercial air transport, general aviation, and government/military aerospace and defense markets in the United States and internationally. It operates in two segments, Avionics Government and Avionics Commercial. The company provides instruments to test, measure, calibrate, and repair a range of airborne navigation and communication equipment. Its products also include TS-4530A, an identification friend or foe test set; T-47/M5, a dual crypto test set; and AN/ARM-206, an intermediate level TACAN test set. In addition, it offers AN/USM-708 and AN/USM-719, which are communications/navigation radio frequency avionics flight line testers; TR-220, a test set that provides test capability for traffic and collision avoidance systems (TCAS), distance measuring equipment, and transponders; TR-36, a commercial navigation and communication test set that provide ramp testing; and TR-420, a ramp test set to test the operation of transponders and interrogators. Further, the company provides multifunction ramp test sets under the T-47NC, T-47NH, and T-47G names; TR-100AF, a rugged ramp test used to verify airborne TACAN equipment; and AN/APM-480A, a transponder, interrogator, and TCAS test set. It sells its products directly or through distributors. The company was founded in 1947 and is headquartered in East Rutherford, New Jersey.