Bristol-Myers sues Merck over U.S. immunotherapy patent

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Bristol-Myers sues Merck over U.S. immunotherapy patent

(Reuters) - Bristol-Myers Squibb Co on Thursday filed a lawsuit against Merck & Co Inc for allegedly infringing its immunotherapy patent. The company is seeking unspecified damages. Immunotherapy is a mechanism that uses the body's own immune system to eliminate cancer cells. In its lawsuit filed in the U.S. District Court of Delaware, Bristol-Myers said Merck was planning to exploit its invention with a later-developed treatment, pembrolizumab, violating the company's May 20 patent. U.S. ...

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