When the predecessor of international fast food restaurant chain Burger King (BK) first opened in 1955, its menu predominantly consisted of hamburgers, French fries, soft drinks, milkshakes, and desserts.
 After being acquired by its Miami, Florida franchisees and renamed in 1954, BK began expanding its menu by adding the Whopper.
 The company did not add another permanent hamburger to its menu until the introduction of the Big King sandwich in 1996 in response to McDonald's Big Mac sandwich.
 The company began experimenting with premium hamburgers, made from higher quality ingredients, in 1978 with the introduction of its Specialty Sandwich product line.
 The products were some of the first designed by a fast food restaurant chain that were intended to capture the adult market, members of which would be willing to spend more on a higher-quality product.
 However, it wasn't until 2002 when the company began to work on a premium burger in earnest.
 On the value side, Burger King first started offering sliders to its menu in the mid-1980s and offered them off and on for the next twenty years.
Herbert Ralph "Herb" Peterson (January 5, 1919 – March 25, 2008) was an American fast food advertising executive and food scientist most known for being the inventor of the McDonald's Egg McMuffin in 1972.
 The breakfast business that he pioneered with this item had grown to an estimated $4–5 billion in annual revenues for the fast food restaurant chain McDonald's by 1993.
Chicken Licken is a South African fast-food fried chicken restaurant chain.
 The company had an 80% share of South Africa's fast food market in 2010, tying with McDonald's.
 According to a case study published by the Henny Penny Corporation in 2011, Chicken Licken is the "largest non-American-owned fried chicken franchise in the world".
A fast food restaurant, also known as a quick service restaurant (QSR) within the industry, is a specific type of restaurant that serves fast food cuisine and has minimal table service.
 The food served in fast food restaurants is typically part of a "meat-sweet diet", offered from a limited menu, cooked in bulk in advance and kept hot, finished and packaged to order, and usually available for take away, though seating may be provided.
 Fast food restaurants are typically part of a restaurant chain or franchise operation that provisions standardized ingredients and/or partially prepared foods and supplies to each restaurant through controlled supply channels.
 The term "fast food" was recognized in a dictionary by Merriam–Webster in 1951.
Nirula's is India's oldest fast food restaurant chain.
 Based in North India and most popular in NCR Delhi, it was Delhi's first fast food restaurant, opening in Connaught Place in 1977.
 Today it has over 70 outlets in NCR Delhi, Bihar, Haryana, Madhya Pradesh, Punjab, Rajasthan and Uttar Pradesh states, offering a “Desi” version of Western fast food items.
 Nirula's success has led them to branch out into other ventures which include, ‘Potpourri’, an Indian cuisine, casual dining restaurant chain; ‘Nirula's 21’, ice cream parlour chain, in addition to pastry shops and two hotels in Noida and Panipat.
 Recently Nirula's opened its first franchise in Patna, their first outlet in the entire east zone.
Chick-fil-A ( , a play on the American English pronunciation of "fillet") is an American fast food restaurant chain headquartered in the Atlanta district of College Park, Georgia, specializing in chicken sandwiches.
 Founded in May 1946, it has more than 2,000 restaurants, mainly in the United States.
KFC, until 1991 known as Kentucky Fried Chicken, is an American fast food restaurant chain that specializes in fried chicken.
 Headquartered in Louisville, Kentucky, it is the world's second-largest restaurant chain (as measured by sales) after McDonald's, with almost 20,000 locations globally in 123 countries and territories as of December 2015 .
 The chain is a subsidiary of Yum!
 Brands, a restaurant company that also owns the Pizza Hut and Taco Bell chains.
Henny Penny is an American manufacturer of commercial grade food equipment based in Eaton, Ohio.
 The company was founded in 1957 and employs over 500 people.
 Notable clients include KFC, Wendy's, McDonald's, Chick-fil-A and Chicken Licken.
 As of 2015, the company is employee-owned.
Restaurant Brands International is a Canadian multinational fast food company.
 Formed in 2014 by the $12.5 billion merger between American fast food restaurant chain Burger King and the Canadian coffee shop and restaurant chain Tim Hortons, and expanded by the 2017 purchase of Louisiana-based and themed Popeyes Louisiana Kitchen, the company is the third-largest operator of fast food restaurants in the world.
 The company is based alongside Tim Hortons in Oakville, Ontario, but both chains retain their existing operations and headquarters in Oakville and Miami respectively.
 The merger focused primarily on expanding the international reach of the Tim Hortons brand, and providing financial efficiencies for both companies.
Krystal is an American fast food restaurant chain headquartered in Atlanta, Georgia.
 It is known for its small, square hamburger sliders with steamed-in onions.
 Krystal moved its corporate headquarters from Chattanooga, Tennessee, where it had been based since 1932, to Atlanta in early 2013.

Question: Henny Penny is an American manufacturer of commercial grade food equipment, notable clients include which American fast food restaurant chain headquartered in the Atlanta district of College Park, Georgia? 
Answer: Chick-fil-A