 Though others are credited with creating a bread product to use for the first hamburgers known to the world, Franz is credited for inventing the hamburger bun in its current worldwide accepted form.United States Bakery has a long history of growth through acquisition.In 2006, the Williams' factory, which had operated on the same site near the University of Oregon (UO) since 1908, was closed and the site sold to UO, which eventually built its current basketball venue, Matthew Knight Arena, there.