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ClearSign Technologies Corporation designs and develops technologies to enhance operational performance, energy efficiency, emission reduction, safety, and overall cost-effectiveness of industrial and commercial systems in the United States and the People's Republic of China. Its ClearSign Core Burner Technology consists of an industrial burner body and a downstream porous ceramic structure or metal flame stabilizing device; ClearSign Core Plug & Play Burner technology provides direct burner replacement for traditional refinery process heaters; and ClearSign Eye Flame Sensor, an electrical flame sensor for industrial applications. The company also provides ClearSign Core Boiler Burner; and ClearSign Core Flaring Burners technologies. It serves energy, institutional, commercial and industrial boiler, chemical, and petrochemical industries. The company was formerly known as ClearSign Combustion Corporation and changed its name ClearSign Technologies Corporation in November 2019. ClearSign Technologies Corporation was incorporated in 2008 and is headquartered in Tulsa, Oklahoma.

Fuel Tech, Inc. provides boiler optimization, efficiency improvement, and air pollution reduction and control solutions to utility and industrial customers worldwide. The company operates through Air Pollution Control Technology and FUEL CHEM Technology segments. The Air Pollution Control Technology segment offers technologies to reduce nitrogen oxide (NOx) emissions in flue gas from boilers, incinerators, furnaces, and other stationary combustion sources; NOxOUT and HERT selective non-catalytic reduction systems; selective catalytic reduction systems comprising ammonia injection grid, and graduated straightening grid systems; I-NOx systems; ESP Processes and Services; ULTRA technology; and flue gas conditioning systems. The FUEL CHEM Technology segment provides programs to improve the efficiency, reliability, fuel flexibility, boiler heat rate, and environmental status of combustion units by controlling slagging, fouling, corrosion, opacity, and acid plume, as well as the formation of sulfur trioxide, ammonium bisulfate, particulate matter, sulfur dioxide, and carbon dioxide through the addition of chemicals into the furnace using TIFI targeted in-furnace injection technology. This segment offers its FUEL CHEM program for plants operating in the electric utility, industrial, pulp and paper, waste-to-energy, and university and district heating markets; and the owners of boilers, furnaces, and other combustion units. Fuel Tech, Inc. was incorporated in 1987 and is headquartered in Warrenville, Illinois.

Hurco Companies, Inc., an industrial technology company, designs, manufactures, and sells computerized machine tools to companies in the metal cutting industry worldwide. Its principal products include general-purpose computerized machine tools, including vertical and horizontal machining centers, turning centers, and toolroom machines. The company also provides computer control systems and related software for press brake applications. In addition, it offers machine tool components, automation integration equipment, and solutions for job shops; and software options, control upgrades, and accessories and replacement parts for its products, as well as customer service, training, and applications support services. Further, the company provides Autobend computer control systems for press brake machines. It serves independent job shops and specialized short-run production applications within large manufacturing operations, as well as precision tool, die, and mold manufacturers in aerospace, defense, medical equipment, energy, automotive/transportation, electronics, and computer industries. The company sells its products under the Hurco, Milltronics, and Takumi brands through independent agents and distributors, as well as through its direct sales and service organizations. Hurco Companies, Inc. was incorporated in 1968 and is headquartered in Indianapolis, Indiana.

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.