QNX developer here. I don't think what you're saying is true. QNX has patents registered in the USA, and in other countries, but that's hardly relevant. It's a Canadian company owned by a Canadian corporation.

BB10, on the other hand, is dead and buried. It would be easier to port something like UBPort's Ubuntu Touch to QNX as an alternative to Android.

What's QNX used for nowadays? Car infotainment systems? Anything else standout?

You can run your in-car infotainment system on Linux, Mac OS, or Windows. QNX can run your brakes and your ignition. Your car dashboard (cockpit console). Your insulin pump. You cancer treatment radiotherapy device. Interplanetary space probes. High-speed rail systems. Everywhere you need software to just always work without a "Windows has experienced a problem and needs to restart" or the Linux equivalent of just silently hanging and requiring a hard power cycle. QNX predates phones by decades, the BB10 was just a passing thing.

But sure, it's also in infotainment systems and at the heart of self-driving cars.

QNX being built from the ground up as a realtime system is a big part of it's reliability and suitability to these tasks I imagine?

Blackberry is a Canadian company. Harman International (the former owner of QNX) was a subsidiary of a South Korean company.

I don't understand what you mean about "US assets, patents, licenses" -- what are you thinking about here?