Imperial's E-Z Go Ribbon Yo-Yo is essentially identical to the Yoffy by Duncan, and the Ribbon Spinnin' YoYo by an unknown maker. Plastic body halves with a cloth ribbon pegged to the axle.
Yo-yo itself has "U.S. PAT NO 4290224" imprinted on it. However, the bubble card has "US Patent Nos. D2755824290224 / 4437261 / 4442625 / 4492057" printed on the bottom of the card on the front. Also has printed below the patent numbers, "FOREIGN PATENTS PENDING".
Toy is from the mid to late 1980s.
Made in Korea for Imperial Toy Corporation of Los Angeles, California, 90021.
