NHLBI: The Air You Wear Challenge - phase one proposals
https://www.challenge.gov/challenge/air-you-wear-challenge/

The National Heart, Lung, and Blood Institute at the National Institutes of Health is sponsoring the Air You Wear Challenge - a two phase challenge with a total prize purse of $500,000 to help teams with compelling ideas to develop and demonstrate proof of concept for their innovative approaches for providing supplemental oxygen to outpatients, while promoting activity in the field and awareness of this problem to the wider community. The NHLBI is interested in providing more supplemental oxygen options to outpatients. Proposed approaches can be for new devices, modifications to existing technologies, or something else entirely.

The goal of this challenge is to broadly stimulate research and development of processes and technologies that actively address the different outpatient issues associated with use of supplemental oxygen. People who use supplemental oxygen and their loved ones are anxious for new options that are lighter, more portable, longer-lasting, and capable of providing the required oxygen level (flow-rate). If you have actionable ideas for how to improve the portability, flow rate, or duration of home oxygen supplies, the NHLBI wants to hear about them.