Inogen, Inc., a medical technology company, develops, manufactures, and markets portable oxygen concentrators used to deliver supplemental long-term oxygen therapy to patients suffering from chronic obstructive pulmonary disease and other chronic respiratory conditions. It offers Inogen One systems, which are portable devices that concentrate the air around them to offer a single source of supplemental oxygen; and related accessories to patients, insurance carriers, home healthcare providers, and distributors. The company sells its products in the United States and internationally. Inogen, Inc. was founded in 2001 and is headquartered in Goleta, California.