English: Three pharmaceutical companies unsuccessfully attempted to patent the drug at the same time, the most prominent one being Roche, which launched its version, Rimifon, in 1952.
Telugu: మూడు బహుళార్థ ఫార్మసీ కంపెనీలు పేటెంట్ల కోసం ప్రయత్నించి విఫలమయ్యాయి (the most prominent one being Roche, which launched its version, Rimifon, in 1952).