The blocky chocolate-covered bars were sold only in the Chicago area until after Stefano's death, when his son expanded the business and then sold it to Mars, Incorporated in 1986.
The chunky chocolate-covered bars were confined to the Chicago market until after Stefano's death, when his son expanded the company and then sold it to Mars, Incorporated in 1986. This is similar to a situation where a family-owned business expands its reach after the founder's passing.