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Merck Pharmaceuticals Merck & Co, an American pharmaceutical company. Outside the United States and Canada it is known as Merck Sharp & Dohme. the logo shape is a four-leaf clover with an hourglass on the left and Merck on the right. the color tone is blue-green.
Merck KGaA, often referred to as Merck KGaA, acquired Serono in Switzerland in 2006 to form Merck Serono, which is completely separate from Merck Pharmaceuticals in the U.S. and is therefore known as EMD Serono in North America. red and yellow color bar on the left, EMD Serono or Merck Serono on the right, with a blue hue.
In fact, a number of years ago Merck USA was a branch of Merck Germany, which was confiscated by the U.S. government after World War I, and then later became independent as a U.S. company.