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Natural Gas Services Group Inc provides natural gas compression equipment and services to the energy industry. The company manufactures, fabricates, rents, sells, and maintains natural gas compressors and flare systems for oil and natural gas production and plant facilities. Its operating units include Rental, Sales, and Aftermarket services. The company generates the majority of its revenue by renting out low- to medium-horsepower compression equipment to natural gas production companies in unconventional oil and gas regions of the United States.
Inogen Inc is a medical technology company that develops and manufactures portable oxygen concentrators used to deliver oxygen therapy to patients with chronic respiratory conditions. Its key product, the Inogen One system, is a lightweight alternative to traditional, stationary oxygen concentrator systems and oxygen tanks. The firm sells its products to home medical equipment providers and also rents products directly to patients. Internationally, It sells its products through distributors large gas companies, and home oxygen providers. It generates the majority of its revenue in the United States.