I don't these stockpiles exist. At least the order by the German government seems only to be fulfilled by new production [2] and other governments might have to queue due to few manufacturers [3]. I don't know if in market forces and IP worked to our good here. I think current design challenges could at least channel random good ideas wrt ventilator designs. [1]

1.Montreal offers $200k prize for cheap and easy to build ventilator design - https://news.ycombinator.com/item?id=22637540

2. https://app.handelsblatt.com/unternehmen/industrie/medizinte...

3.https://www.srf.ch/news/schweiz/knappheit-wegen-coronavirus-...

It absolutely isnt a solved problems, most countries affected by the pandemic do not manufacture the ventilators and have like a 10x shortage compared to what's needed to incubate everyone who will be sick. (Obviously depending on how bad it gets).

The struggle to ramp up production is a desperate one, and this is one case where IP is killing people - there are several consortia in the UK that are ready to manufacture, but need a certified design they could build.

For the US, the potential needs is in the millions and the current ventilator count is 100,000 (plus or minus tens of thousands).

I think we probably agree that industrial production is the way forward, but the numbers are not particularly comfortable.

> potential needs is in the millions and the current ventilator count is 100,000

There are only 96,596 ICU hospital beds in the United States according to the AHA. As I said, ventilators are already solved to the point that something else is the bottleneck.