iRobot (IRBT) Hits New All-Time High

iRobot (IRBT) hit a new all-time of $44.35 yesterday (02014.02.11) before closing at $41.99 (up 11.4% for the day). Volume was almost 5-time trailing-3-month average. Why did IRBT spike upward yesterday? I saw the following reported by multiple sources: iRobot was ranked No. 5 on a list of top patent portfolios in the electronics and instruments industry.