Hillward Bakers have been using since their inception ten years ago, a blue HB logo with a baker's hat on the HB. Hobert Bakers, a newly opened bakery and confectionary chain, has used the same logo. Hillward has not registered its logo, but chooses to sue Hobert. Which of the following is true of this case?
A. Trademark
B. Patent
C. Copywrite
D. Tradesecret
E. Collective mark