The story
Fred Angell was a butcher in Muscatine, Iowa, who combined a special cut and grind of meat with a selected set of spices and created the Maid-Rite sandwich, which is not a traditional hamburger. Rather, it is called a "loose meat" sandwich. While the component meat is similar, the Maid-Rite sandwich's meat is not formed into a patty, making it similar to a sloppy joe without the tomato-based sauce.
Restaurants
Angell opened his first restaurant in Muscatine, which was strictly walk-up. Later, a new eat-in building was opened. He and his son, Francis Angell, opened a second restaurant, featuring a "car hop" or drive-in service. This was the first such service of this kind in the United States; A&W Restaurants and White Castle Restaurants replicated this service shortly thereafter.
The first franchise was opened in Durant, Iowa, which still maintains a Maid-Rite restaurant. Maid-Rite began to grow in the number of franchises throughout the United States under the direction of William Angell, the grandson of the founder.
From Wikipedia’s article on Maid-Rite, shared under CC BY-SA 4.0.3