NautaDutilh remains one of the Netherlands' highly respected law firms and its IP department, led by Charles Gielen, also received high praise from peers. Another member of the team, John Allen, was also recommended. On the patent litigation side, the team focuses on biotechnology, medical devices and telecommunications. Allen is representing the licensing company High Point in an important patent infringement litigation case against KPN, the mobile network operator. The case concerns High Point's patent to a UMTS network architecture. Allen and Marlous Schrijvers advised Holland's largest cable and internet provider, Ziggo, in a file sharing case brought by Brein.