<P> In 1948, William Rosenberg opened Open Kettle, a restaurant selling donuts and coffee in Quincy, Massachusetts; in 1950, the restaurant was given the name Dunkin' Donuts . Rosenberg conceived of the idea for the restaurant after his experiences selling food in factories and at construction sites, where donuts and coffee were the two most popular items . The restaurant was successful, and Rosenberg sold franchises of Dunkin' Donuts to others starting in 1955 . </P> <P> In 1963, Rosenberg's son Robert became CEO of the company at the age of 25 . In that same year, Dunkin' Donuts opened its 100th location . Dunkin' Donuts was at the time a subsidiary of Universal Food Systems, a portfolio of 10 small food service businesses . And Dunkin' Donuts locations varied greatly, with some selling full breakfasts and other food and others serving only donuts and coffee . </P> <P> In the following years, the other businesses in the Universal Food Systems portfolio were sold or closed, and the company was renamed to Dunkin' Donuts . The menu and shop format were standardized, and various new menu items were introduced . In 1990, Allied Lyons, which already owned Baskin - Robbins, purchased Dunkin' Donuts, and the two restaurants merged operations . By 1998, the brand had grown to 2,500 locations worldwide with $2 billion in annual sales . In 2004, the company's headquarters were relocated to Canton, and in December 2005, Dunkin' Donuts and Baskin - Robbins were sold as Dunkin' Brands to a consortium of three private - equity firms: Bain Capital Partners, the Carlyle Group and Thomas H. Lee Partners . </P> <P> in 2006, Dunkin' Donuts began using the slogan "America Runs on Dunkin"' which continues to be used in many advertisement campaigns . By 2010, Dunkin' Donuts' global system - wide sales were $6 billion . In 2012, Dunkin' Donuts launched an application for payment and gifting for iPhone, iPod touch, and Android smartphones . In 2014, Dunkin' Donuts launched their first loyalty program . </P>

When did dunkin donuts start selling iced coffee