An Elizabethan collar, E-collar, Buster collar or pet cone is a protective medical device worn by an animal, usually a cat or dog. Shaped like a truncated cone, its purpose is to prevent the animal from biting or licking at its body or scratching at its head or neck while wounds or injuries heal. The collars are named from the ruffs worn in Elizabethan times. A U.S. patent was filed by Frank L. Johnson in 1959.
