America owes its fascination with the yo-yo mainly to Chicago businessman Donald F. Duncan Sr., who spotted it while on a business trip to San Francisco in 1928. It was being used by Pedro Flores, a ...

The earthquake for Duncan came in 1965, when a lawsuit found that the term “yo-yo” had lost its trademark status, like “zipper” or “aspirin.” Competitors sprung up.

June 6 marks National Yo-Yo Day, a celebration of one of the world's oldest and most enduring toys. The date honors the birthday of Donald F. Duncan Sr., the entrepreneur who helped turn the yo-yo ...

CLEVELAND, Ohio -- It’s been 90 years of fun for Duncan Toys, an Ohio company known for its yo-yos. To celebrate, it’ll be slinging out a few yo-yo events in downtown Cleveland this summer ...

Quick-moving, looping yo-yo tricks were performed by about 70 competitors during the Duncan International Yo-Yo Championship at Downtown Disney. The second annual event showcases a range of yo-yo t… ...

Duncan, a marketer, entrepreneur and manufacturer of wooden novelty items and toys, immediately recognized the yo-yo’s potential as a popular new toy. He quickly raised $5,000 to purchase initial ...