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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.

Chicago Rivet & Machine Co. operates in the fastener industry in North America. It operates in two segments, Fasteners and Assembly Equipment. The Fastener segment manufactures and sells rivets, cold-formed fasteners and parts, and screw machine products. The Assembly Equipment segment engages in the manufacture and sale of automatic rivet setting machines, as well as parts and tools for related machines. The company sells its products to automotive industry through independent sales representatives. Chicago Rivet & Machine Co. was founded in 1920 and is headquartered in Naperville, Illinois.

Nanophase Technologies Corporation, a science-driven company, develops, manufactures, and sells integrated family of nanomaterial technologies in the United States. It engages in engineered materials, formulation development, and commercial manufacturing. The company produces engineered nanomaterial products comprising antimony, bismuth, cerium, iron, and zinc oxide for use in a various markets, including surface finishing,exterior coatings, personal care, plastics, scratch resistant coatings, and textiles. It also provides skin care formulations with mineral-based UV protection under the under the Solésence brand; and advanced material products, including architectural coatings, industrial coatings, abrasion-resistant additives, plastics additives, medical diagnostics, and surface finishing technologies applications. The company was incorporated in 1989 and is headquartered in Romeoville, Illinois.

BOQI International Medical, Inc. engages in the provision of healthcare products. It deals with the retail and wholesale of medical devices, pharmaceuticals, and other relates services. It intends to establish a chain of hospitals specializing in obstetrics and gynecology. The company was founded on October 31, 2000 and is headquartered in Dalian, China.

QS Energy, Inc. develops and commercializes energy efficiency technologies in the United States and internationally. The company's energy efficiency technologies assist in meeting energy demands, enhancing the economics of oil transport, and reducing greenhouse gas emissions. Its intellectual properties include a portfolio of domestic and international patents, which have been developed in conjunction with and licensed from Temple University of Philadelphia, Pennsylvania. The company's primary technology comprises Applied Oil Technology, a commercial-grade crude oil pipeline transportation flow-assurance product that reduces crude oil viscosity by applying a high intensity electrical field to crude oil while in transit. It serves upstream and midstream energy sectors. The company was formerly known as Save the World Air, Inc. and changed its name to QS Energy, Inc. in August 2015. QS Energy, Inc. was incorporated in 1998 and is based in Tomball, Texas.