I think that applies only if it is stated so in the contract and that the contract was acknowledged and signed by the inventor/creator.
Generally speaking, all engineers and managers at a tech firm will sign a contract stating such. It's standard practice.
But what escapes me in this tale is...
A) Is Andy Rubin so forgetful that he would not remember he already wrote the same codes for Apple a few years ago while creating a brand new operating system?
He wouldn't remember exact code but he would remember in general what stuff he did, unless it's like 10 years ago. But yeah, this one's a head scratcher.
B) If said patent digs so far down into Android's core, how come Apple didn't file claims against all other manufacturers at once... plus Google, but only against HTC in this case?
Probably a PR campaign at this point is the only thing I can think of. If Apple had a real smoking gun, they'd already have sued Android and tried to get a general ban on all Android devices.
As for HTC, Apple has a few things related to UI they're suing HTC for. Not everyone may use the same UI elements. The other aspect of this is that generally you sue the guy who can't fight back, or has limited ability to fight back to try to get an easy win. When/if you win you go to court and sue the bigger fish with court precedence in your corner.
And either way, it's just bullying... if Apple already held these patents, then they simply waited until someone profited enough off of Android to sue and claim damages.
Welcome to Patent Litigation 101.
Would Apple rather not have any competition? That's not very American of them is it?
American? No. Capitalistic? Yes. And you're delusional if you don't think HTC, Samsung, Moto, etc. don't think the same way.