5th update: sanofi-aventis vows to defend plavix patents

By Alice Dore and Hans Schoemaker PARIS -(Dow Jones)- Sanofi-Aventis (SNY) Friday vowed to defend patents for its second-biggest product Plavix after Schweizerhall Holding AG (SWHN.Generic Upstart Rattles Sanofi ForbesSchweizerhall says near generic Plavix launch MarketWatchWall Street Journal - Bloomberg - Reuters - FiercePharma