The BBC controls all Doctor Who imagery, and has indeed registered a trademark on the word "dalek."
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.
Universal.
Word Music.
Rankin/Bass.
Rondor Music.
Paramount.
There are 24 different copyright-protected items by that name.
1st . dalek caan 2nd. dalek sec 3rd . dalek they 4th . dalek jast
The Dalek that went insane after pulling Davros from the time-war is Dalek Caan, apart of the Cult Of Skaro (Dalek Sec, Dalek Caan, Dalek Jast, Dalek They)
The phrase "copyright obtained" doesn't give any indication of who copyright might be assigned to.