India revokes patent on Merck & Co asthma drug
MUMBAI (Reuters) - India has revoked a patent granted to an asthma drug made by Schering Corp, later bought by U.S.-based Merck & Co (MRK.N), citing lack of invention, after Indian drugmaker Cipla Ltd (CIPL.NS) challenged an earlier decision.The move is the latest in a series of patent cancellations by India, where generic medicines account for more than 90 percent of drug sales by value and ...
