These are the results of my DD so far:
I still haven't received even one reply to the emails I sent to the companies mentioned in the PRs. I'm thinking that they don't reply because either, 1) they don't have a clue what I'm talking about, or 2) they think it's some kind of spam to try to sell them something.
I've also called the companies, but haven't been able to reach anyone who could give me any info. I've left messages, but no one has returned my calls yet.
Also, I've been in contact with four different Canadian truckers and none of them has ever heard of this drowsiness detection device. You'd think news about such a technology would spread among truckers quickly. But, maybe I'm just talking to the wrong truckers.
So, in summary, still no verification of any of the contracts claimed in the PRs. I'll keep trying, and report my results here.