Inogen discarded existing paradigms to design and build an oxygen concentrator that redefines how oxygen therapy is delivered. Described by industry experts as "a technological breakthrough", the Inogen One is a complete departure from current mainstream technologies - both the standard large, bulky, stationary concentrator systems and the inefficient and impractical portable devices. Working with experts in PSA and conserver technology, Inogen's engineers developed, tested and delivered a technology that eliminates the need to choose between a stationary or portable oxygen system.