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Electro-Sensors, Inc. engages in the manufacture and selling of industrial production monitoring and process control systems. Its products include shaft speed witches; wireless hazard monitoring; temperature sensor; slide gate and angle position; bearing sensors and belt alignment; and motor drive control. The company was founded by James P. Slattery in 1965 and is headquartered in Minnetonka, MN.

National Energy Services, Inc. is a holding company that is engaged in building a portfolio of complementary services through acquisitions. It primarily focuses on drilling services, operation services, and maintenance services of the well-site activities. The company was founded on January 27, 1997 and is headquartered in Las Vegas, NV.

Schmitt Industries, Inc., together with its subsidiaries, designs, manufactures, and sells test and measurement products worldwide. The company operates through two segments, Measurement and Ice Cream. The Measurement segment designs, manufactures, and sells laser and confocal chromatic white light sensors for distance measurement and dimensional sizing products under the Acuity brand name for various industrial applications, including manufacturing, lumber production, steel casting, glass and paper production, medical imaging, crane control and micron-level part, and surface inspection. It also offers AR2700 high speed long range sensor for application in bridge crane monitoring, trolley positioning, and altitude measurements; 8-inch touch panel display, a full suite of connection ports; and satellite focused remote tank monitoring products under the Xact brand that measure the fill levels of tanks holding propane, diesel, and other tank-based liquids, as well as related monitoring services, including transmission of fill data from the tanks via satellite to a secure website for display. The Ice Cream segment manufactures, wholesales, and retails ice creams, ice cream cakes, and related products, as well as sells through its website; and serves ice cream at catering events and holds various community-building events comprising ice cream classes, and live comedy and music performances through Ample Hills Creamery brand. Schmitt Industries, Inc. was incorporated in 1984 and is headquartered in Portland, Oregon.

Universal Detection Technology engages in the research, development, marketing, and resale of detection devices for detecting chemical, biological, radiological, and nuclear threats in the United States, Europe, and Asia. It supplies bioterrorism detection kits capable of detecting anthrax, ricin, botulinum, plague, and SEBs; mold detection kits; chemical detection equipment; and radiation detection systems. The company also provides various counter-terrorism services, such as training courses for first responders; event security; threat evaluation and consulting; and DVDs aimed at providing information and training regarding combating terrorism and managing emergency situations. It serves first responders, as well as bioterror and military defense markets. The company markets and sells its products through in-house staff and outside consultants, as well as through the Internet. The company was formerly known as Pollution Research and Control Corporation and changed its name to Universal Detection Technology in August 2003. Universal Detection Technology was founded in 1971 and is headquartered in Beverly Hills, California.