He rushed home and connected his mother to a rechargeable oxygen machine but knew a long-term solution was needed. "I happened to call my friend and he said he had a generator which he would ...

He said you can buy a power generator or portable, non-electric oxygen equipment. He also said it's a good idea to keep your oxygen equipment instructions and a list of serial and model numbers ...

This inspired the development of a device that could be made quickly for emergencies without electricity ... high-pressure and high-concentration oxygen generators, patients with mild-stage ...