Michael "Jim" Delligatti, who according to his son ate at least one 540-calorie Big Mac a week for decades, was 98.
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Delligatti's franchise was based in Uniontown, not far from Pittsburgh, when he invented the chain's signature burger in 1967 after deciding customers wanted a bigger sandwich. Demand exploded as Delligatti's sandwich spread to the rest of his 47 stores in Pennsylvania and was added to the chain's national menu in 1968.
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