Ingen Technologies, Inc., a medical device manufacturing company, manufactures medical products for the respiratory industry in United States. The company manufactures medical equipment for patients suffering with chronic obstructive pulmonary disease; and oxygen flow meters and nasal cannulas under the Oxyview and Smart Nasal Cannula trademark name. Its Oxyview is a pneumatic metering device that displays and confirms the oxygen flow rate near the patient. Ingen Technologies, Inc. was founded in 1999 and is based in Riverside, California.