March 5 (Reuters) - Merck MRK.N has asked the U.S. patent office to reconsider patents that could prevent it from selling a new version of its cancer drug Keytruda, the Wall Street Journal reported on Wednesday.
(Reporting by Christy Santhosh in Bengaluru; Editing by Shilpi Majumdar)
((Christy.Santhosh@thomsonreuters.com;))
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