These are off the top of my head, but you can look them up.
A. Copyright generally applies to written work, excluding titles. Think poetry, prose, music.
B. Patent is for inventions, or original or modified design. Think Tremol-No.
C. Trademark is what you're looking for here. It's for an easily identifiable shape, pattern, etc. that is associated with an entity. Think Fender headstock.
Sorry, but confusing those terms is one of my pet peeves.