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Paul Mueller Company, together with its subsidiaries, provides manufactured equipment and components in the United States, North America, Asia, the Far East, the Netherlands, EU countries, Europe, and internationally. The company operates through four reportable segments: Dairy Farm Equipment, Industrial Equipment, Field Fabrication, and Transportation. The Dairy Farm Equipment segment offers milk cooling and storage equipment and accessories, refrigeration units, and heat recovery equipment for use on dairy farms to independent dealers for resale, and directly to farmers; and services for farmers, as well as milk coolers for rent to farmers. The Industrial Equipment segment sells food, beverage, chemical, and industrial processing equipment; and biopharmaceutical and pure water equipment, as well as stainless steel, alloy processing, storage tanks, and heat transfer products. The Field Fabrication segment sells large, field-fabricated tanks and vessels, such as stainless steel storage tanks for sanitary and industrial process applications. The Transportation segment offers delivery of products to customers; backhauls of materials and components; and contract carriage for third parties. It serves its products in various industries, including animal health, beverage, brewing, chemical, dairy farm, dairy processing, food, heat transfer, HVAC, industrial construction, oil and gas, personal care, pharmaceutical, pure water, tank fabrication, and wine. The company was founded in 1940 and is headquartered in Springfield, Missouri.

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.

Terra Tech Corp. cultivates, produces, and retails medical and adult use cannabis products. The company also operates medical marijuana retail and adult use dispensaries, cultivation, and production facilities in California and Nevada under the Blüm name in California and Nevada. Terra Tech Corp. was founded in 2010 and is based in Santa Ana, California.