Asetek is no stranger to water cooling or defending the companies numerous patents in the court room. It appears that Asetek suing Cooler Master as they believe that the Cooler Master Seidon line of closed-loop liquid coolers use technologies that they have patents on (8,240,362 and 8,245,764.) The civil case (Civil Action No. 3:13-cv-00457-JSC) was filed on January 31, 2013, and will be handled by a US court and its outcome will depend on Cooler Master's defense.  You can read the case below.

8,240,362, “Cooling system for a computer system” by Eriksen, includes 19 claims (3 indep.). It was assigned to Asetek A/S, prosecuted by Finnegan, Henderson, Farabow, Garrett & Dunner LLP, and was application 12/826,768. It was filed on 6.30.2010 & granted on 8.14.2012.

8,245,764, “Cooling system for a computer system” by Eriksen, includes 18 claims (3 indep.). It was prosecuted by Finnegan, Henderson, Farabow, Garrett & Dunner, LLP., and had the application 13/269,234. It was granted on 8.21.2012.