Walter Frederick Morrison disc more cheaply. In 1955, he and Lu designed the Pluto Platter, the archetype of all modern flying discs. On January 23, 1957, they sold the rights for the Pluto Platter to the Wham-O toy company. Initially Wham-O continued to market the toy solely as the "Pluto Platter", but by June 1957 they also began using the name "Frisbee" after learning that college students in the Northeast were calling the Pluto Platter by that name. Morrison also invented several other products for Wham-O, but none were as successful as the Pluto Platter. Morrison and his wife, Lu Nay Morrison had
Pluto (Disney) referred to as "Pluto Junior." In the 1946 animated short "Pluto's Kid Brother", Pluto has a younger brother named K.B. Pluto first and most often appears in the "Mickey Mouse" series of cartoons. On rare occasions, he is paired with Donald Duck ("Donald and Pluto", "Beach Picnic", "Window Cleaners", "The Eyes Have It", "Donald's Dog Laundry", & "Put Put Troubles"). The first cartoons to feature Pluto as a solo star were two Silly Symphonies, "Just Dogs" (1932) and "Mother Pluto" (1936). In 1937, Pluto appeared in "Pluto's Quin-Puplets" which was the first installment of his own film series, then headlined