Oh, a little clarification on the US Supreme Court and US law.
The Supreme Court handed down some good, but somewhat murky, rulings a few decades ago. Since then the lower courts have gone batshit insane throwing out all limitations on patentability.
Part of the reason is that many court cases involving a megacorp on one side demanding they be given a patent on X, and on the other side is some lawyer from the patent office arguing X isn't a valid invention. And of course the army of megacorp lawyers tends to steamroll the patent office lawyer, establishing some new tidbit of twisted precedence. Case, after case, after case, they steadily pushed the line (and the rules) off into the Twilight Zone.
Oh, and the corporations are free to file their case in any US district they want. So they ALL file in the same district... the Eastern District of Texas. That district has a well deserved reputation for judges having the most extreme ideology, granting and uphold anything that has the word "patent" scribbled on it in crayon.
In the last few years the Supreme Court has taken notice and started issuing some harsh smackdowns against the nutty logic of the lower courts. Unfortunately the Supreme Court has been issuing "narrow" rulings, basically they've stated that X Y and Z are insane interpretations of patent law, they've said invalid patents are being granted, but haven't clarified which or how many invalid patents are being granted, and basically all the Supreme Court said is "Yo, you're fucking up, go back and follow our old rulings on patents". Except the lower courts have spent the last few decades becoming experts in how to actively not understand those Supreme Court rulings.
So, the current general practice of US patent law is that they still accept insane patents from Twilight Zone, but the judges know most of the basis for doing so has been struck down, and the judges are arguing with each other in utter confusion desperately trying to figure out some coherent set of logic and rules.
And a major problem is that any sane set of rules, anything coherent with the old Supreme Court rules, is basically going to invalidate over a HUNDRED THOUSAND existing patents. Many of the district judges are dead set on the mindset that those patents are valid, and the more reasonable judges are insecure at the prospect of making a "radical" ruling that would create chaos by invalidating vast numbers of existing patents.
Ummm... this post was supposed to be a "small note" explaining the Supreme Court quote from my other post, and why we're in a mess despite having that obvious-solution quote. I guess I got carried away. Chuckle.