Molson Coors Brewing Company was created by the merger of two of North America's largest breweries: Molson of Canada, and Coors of the United States, on February 9, 2005.
 Coors is responsible for over twenty different brands of beer in North America and the UK.
 The main brands are "Coors" and "Killian's".
 Molson brands include "Carling Black Label" and "Molson Canadian".
The Molson Brewery was formed in Montreal in 1786.
 In 2005 Molson merged with US-based Coors to form Molson Coors Brewing Company, the world's seventh-largest brewing company at that time.
 The Canadian division of the Molson Coors Brewing Company is Molson-Coors Canada Inc..
 Molson's first brewery was located on the Saint Lawrence River in Montreal where the Molson family continues to maintain its operations today.
Coors Brewing Company, or Coors, is now part of the Molson Coors Brewing Company.
Coors Brewers Limited, later known as Molson Coors Brewing Company (UK) Limited is the UK arm of Molson Coors Brewing Company.
 Its headquarters is in Burton upon Trent, Staffordshire, the company originates from Bass Brewers Limited.
 The company, has gone through many name changes and mergers.
The Molson Coors Brewing Company is a multinational brewing company, formed in 2005 by the merger of Molson of Canada, and Coors of the United States.
 It is the world's seventh largest brewer by volume.
The Miller Brewing Company is an American beer brewing company headquartered in Milwaukee, Wisconsin, that was owned until October 11, 2016 by the MillerCoors division of the MillerCoors–Molson Coors joint venture.
 The company has brewing facilities in Albany, Georgia; Chippewa Falls, Wisconsin; Fort Worth, Texas; Irwindale, California; Milwaukee, Wisconsin; and Trenton, Ohio.
 On July 1, 2008, Miller formed MillerCoors, a joint venture with rival Molson Coors to consolidate the production and distribution of its products in the United States, with each parent company's corporate operations and international operations to remain separate and independent of the joint venture.
The Coors Brewing Company is a regional division of the world's third-largest brewing company, the Molson Coors Brewing Company.
 Until October 11, 2016, the operations in the United States were a joint venture with SABMiller called MillerCoors.
 Coors operates a brewery in Golden, Colorado, that is the largest single brewery facility in the world.
 Since that time, Coors is a division of Molson Coors.
The AC Golden Brewing Company is a subsidiary of MillerCoors, a joint venture between SABMiller and Molson Coors Brewing Company.
 Its purpose is to serve as a specialty brewing arm of MillerCoors, in the words of president Glenn Knippenberg, "Our mission for AC Golden is to be a brand incubator for what is now MillerCoors".
 The AC Golden Brewery operates in the former pilot brewery of the Coors Brewery.
 It debuted its first beer, Herman Joseph's Private Reserve, in 2008.
 The company began brewing its seasonal beer, a Vienna Style lager called Winterfest, in 2009.
 In April 2010, AC Golden introduced Colorado Native lager in Colorado, an amber lager made with 100% Colorado ingredients.
Devon Energy Corporation is an independent natural gas, natural gas liquids, and petroleum producer focused on onshore exploration and production in North America.
 The company is headquartered in the 50-story Devon Energy Center, completed in 2012, in Oklahoma City, Oklahoma.
MillerCoors is a beer brewing company in the United States.
 In 2002 South African Breweries purchased Miller Brewing Company to create SABMiller.
 In 2005, Molson Brewery of Canada and Coors Brewing Company merged to form the Molson Coors Brewing Company.
 Then, in 2008, SABMiller and Molson Coors created MillerCoors as a joint venture for their operations in the U.S.
 The company is the second-largest brewer in the U.S., after Anheuser-Busch.

Question: Devon Energy and Molson Coors Brewing Company,have headquarters in which county?
Answer: United States