Roche to warn a patent infringement against local companies.

F. Hoffmann La Roche AG advised for local companies not to infringe their patent of Carvetidil that was already registered in Korea, an exclusive therapeutic drug for congestive heart failure (CHF), asking them immediately to suspend their production, sales and marketing activities on the carvetidil preparations in Korea.

The company said that any company attempting to produce and sell the c...