This topic also came up recently on the Fractal forum. In that thread, someone posted a link to this article.
Behringer’s case was dismissed with prejudice. The fight is hardly over, but it seems that in order to refile they may have to be more specific, and disclose their methods. Behringer could try to refile from another angle, or in a another jurisdiction trying to establish a precedent. Who knows?
But it’s worth reading. I would love to have polyphonic tuning. I swear by TC’s polytune, and own 6 of them with various rigs. It’s my only tuner for live situations, a quick strum to check tuning and I’m good to go.