Stratagene said Third Wave's Invader technology infringed on two of the four patents behind its FullVelocity line of Q-PCR products mid-day on May 9. Third Wave's stock price stood at $4.26 when the market closed May 9, and has dropped to $3.95 in mid-after noon trading today.
Third Wave sued Stratagene in September, claiming that FullVelocity patents infringed on its Invader patents. That suit is ongoing.