The patent was a side issue. I really wanted to get the device into use.
Being low cost you could have many of them on hand for mass casualty situations. You could have a dozen patients on oxygen with the mask/bag and minimal observers could see who was breathing on their own and who needed assisted breathing. You had only to breath into the bag and your breath pushed O2 into the patient. No contact of breath of the patient to person giving ventilatons. ie no transfer of pathogens or chemicals. No removal of mask to apply a hand bag. Perfect for large sacle use.
If push comes to shove you can make them in the field by taping two O2 bags together, opposite ends. One bag discharges to the mask (the one supplied with the O2) the other bag discharge end becomes a mouth piece.
Did I say cheap too?
I think the reason the device was rejected by the manufacturer was because there was no immediate market for it. The army told me they were stretched on their research
dollars and would be interested if an outside entity spent the research money. Something I don't have. Medical research is expensive even for simple devices.
I think it's heck of a good idea. I think I'd be hard pressed to render aid to someone who I suspected of having AIDS. You ought to pursue it, don't be discouraged.