Professor

The Professor is a bearded scientist-type character in a lab coat in 1971-1987 McDonald's commercials. He served as McDonaldland's local inventor and researcher. In 1983 (the year the Chicken McNuggets became a menu item), he invented live talking, delicious food items called the McNugget Buddies.

The Professor was portrayed by Lou Wagner, and voiced by Andre Stojka.

Description
In the 1970s, he was a minor character who rarely spoke (usually in a high pitch voice). He had brown hair, which became more gray overtime by the late 70s, wore a white lab coat, and brown trousers.

Around the 1980s, the Professor was a major character, and was redesigned to include a lightbulb-topped helmet, round spectacles, and a mustache. His pants began to have a blue flannel appearance.

Though the character was dropped during the streamlining of the characters in the mid-1980s, he did appear in McDonald's Treasure Land Adventure where he invents a rocket-ship to take Ronald and his friends to Magical Moon and appeared in M.C. Kids.