I am a former lawyer who clerked for 2 different federal judges. This is what I think:

The author should sue Nvidia & try to at least force a settlement. What the F are these lawyers doing? When a billion bucks is what you're trying to legitimately claim, the unpredictability of a trial is going to get them to toss you some millions, which is pocket change to Nvidia. At least go get those millions.

It is possible it doesn't work out, but jeez, I'd definitely take the next step. Go consult some more creative lawyers.