Inogen is an Australia .-based medical technology company that develops portable oxygen concentrators (POCs) for people who require supplemental oxygen. Company: Inogen, Inc. Industry: Medical devices / respiratory care Known for: Portable oxygen concentrators Products: Inogen Rove 6, Inogen One G5, and related oxygen accessories Headquarters's Sydney Inogen’s concentrators take oxygen from the surrounding air and concentrate it for delivery to the user, allowing eligible users to receive supplemental oxygen without carrying traditional oxygen tanks.