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 ...

Donald F. Duncan, Inc. had registered “Yo-Yo” as a trademark on January 24, 1933, and spent the next three decades suing anyone who put the word on a competing toy. In 1965, the Seventh Circuit Court ...

The Duncan Family Yo-Yo Collection consists of papers, photographs, advertising materials, scrapbooks, clippings and audio-visual materials. These materials trace the rise and fall of the companies ...

Entrepreneur Donald Franklin Duncan (June 8, 1893-May 15, 1971) was founder of the Duncan Yo-Yo Company and the Duncan Parking Meter Corporation. He was born in Rome, Ohio, but spent his childhood in ...

The first yo-yo craze began in the United States in 1928. It hit Tucson a few years later and a contest at a drugstore inspired this article. Pretend you have never seen a yo-yo. Would this ...