Lou Groen of Cincinnati, Ohio

Cincinnati, Ohio

Cincinnati is a city in the U.S. state of Ohio. Cincinnati is the county seat of Hamilton County. Settled in 1788, the city is located to north of the Ohio River at the Ohio-Kentucky border, near Indiana. The population within city limits is 296,943 according to the 2010 census, making it Ohio's...

 is famous for inventing the Filet-O-Fish

Filet-O-Fish

The Filet-O-Fish is a fish sandwich sold by the international fast food chain store McDonald's.-Product description:...

 sandwich

Sandwich

A sandwich is a food item, typically consisting of two or more slices of :bread with one or more fillings between them, or one slice of bread with a topping or toppings, commonly called an open sandwich. Sandwiches are a widely popular type of lunch food, typically taken to work or school, or...

 in 1962. He invented the sandwich at his floundering McDonald's

McDonald's

McDonald's Corporation is the world's largest chain of hamburger fast food restaurants, serving around 64 million customers daily in 119 countries. Headquartered in the United States, the company began in 1940 as a barbecue restaurant operated by the eponymous Richard and Maurice McDonald; in 1948...

 restaurant to satisfy his customers. At the time, most of his customers were Roman Catholic who had to abstain from eating meat on Friday. His invention (the fish sandwich), served with cheese and tartar sauce, is now served at McDonald's restaurants throughout the world.

At his peak, Lou Groen owned 43 stores in the Ohio and northern Kentucky region, eventually selling them back to the McDonald's corporation.

Lou Groen died on May 30, 2011.