The song itself is administered by Sony/ATV, and the Bill Haley recording is controlled by Decca. Other performances and recordings will have their own protection.
Nobody owns the copyright of a single word. Perhaps you mean trademark.
the coca cola company owns the copyright
A minor owns the copyright on any works they create.
No single person or entity owns Linux. Code is contributed by people and companies from around the world, with each of them holding some copyright to the code.
Universal.
Word Music.
Rankin/Bass.
Rondor Music.
Paramount.
There are 24 different copyright-protected items by that name.
The phrase "copyright obtained" doesn't give any indication of who copyright might be assigned to.
You can't. It is a right that the writer owns. You can offer to buy the copyright.