About William Rosenberg
William Rosenberg was an American entrepreneur who founded the Dunkin' Donuts franchise in 1950 in Quincy, Massachusetts, one of the pioneers in name-brand franchising, originally named the "Open Kettle" doughnut shop when established in 1948. At the end of 2011, there were more than 10,000 outlets of the chain in 32 countries. Rosenberg created his own catering vehicles, with sides that rose to reveal sandwiches and snacks stocked on stainless steel shelves, an early predecessor to the mobile catering vehicle. He later became the first Jewish trade union delegate.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.