> In the absence of a ruling from the Supreme Court, the previous ruling from the Court of Appeals for the Federal Circuit is binding precedent on the whole country that APIs are copyrightable.
This is not true - other circuit courts are free to set their own, conflicting precedent. Each circuit's decisions are binding only on its own judges, and suggestive but not binding on other circuits.
Circuits deciding differently (a "circuit split") is uncommon, and considered urgent grounds for the Supreme Court to take up a test case to resolve the ambiguity; but it's not considered a "breaking" of precedent by either circuit, just a difference of interpretation for the Supreme Court to resolve
For most circuits what you say would be true. But the Court of Appeals for the Federal Circuit is special. As http://www.cafc.uscourts.gov/the-court/court-jurisdiction says, their jurisdiction is national and determined by subject matter.
That said I do not actually know whether they would be binding on another circuit court. But they are definitely binding on all federal courts lower than that.
However that question is sort of moot. It is extremely easy for the entity filing the case for infringement to include something about patent or trademark in the suit, which guarantees that you wind up in the Court of Appeals for the Federal Circuit. Where that ruling is binding.
> their jurisdiction is national and determined by subject matter.
Copyright is not part of their subject matter jurisdiction.
> However that question is sort of moot. It is extremely easy for the entity filing the case for infringement to include something about patent or trademark in the suit, which guarantees that you wind up in the Court of Appeals for the Federal Circuit. Where that ruling is binding.
It’s not, though; outside of its own subject matter jurisdiction, CAFC is bound by the law of the Circuit to which the trial court belongs, which it, in theory, merely applies. Another case coming up through the Northern District of California like Oracle v. Google did would be governed vy Ninth Circuit, not Federal Circuit, copyright precedent even if heard in the Federal Circuit because of other issues in the case.
This is not true - other circuit courts are free to set their own, conflicting precedent. Each circuit's decisions are binding only on its own judges, and suggestive but not binding on other circuits.
Circuits deciding differently (a "circuit split") is uncommon, and considered urgent grounds for the Supreme Court to take up a test case to resolve the ambiguity; but it's not considered a "breaking" of precedent by either circuit, just a difference of interpretation for the Supreme Court to resolve