Donald Duck universe and keeps it on a pillow under glass because of its sentimental value. Donald Duck, Huey, Dewey, and Louie, and Gladstone Gander among many others think it is really a lucky charm, but Scrooge himself rejects any claims beyond sentimentality. Donald Duck and his maternal uncle Scrooge McDuck received nearly equal exposure in comics. Other primary characters include Donald's three young nephews Huey, Dewey, and Louie, and girlfriend Daisy Duck. Several secondary characters have also achieved star status in certain publications, such as Grandma Duck, Donald Duck's grandmother; Gladstone Gander, Donald Duck's incredibly lucky cousin; Gyro Gearloose, an inventor who
The Oregon Duck logo. Relying on the photo as evidence of Disney's wishes, in 1973, both parties signed a formal agreement granting the university the right to use Donald's likeness as a symbol for (and restricted to) Oregon sports. The agreement gave Disney control over where the mascot could perform and ensured that the performer inside the costume would "properly represent the Donald Duck character." In 2010, Disney and the university reached an agreement that removed the costumed Oregon Duck mascot from its association with the Donald trademark, and allowed The Duck to make more public appearances, such as at college mascot competitions.