A jury has ordered RIM to pay $23m (£13.3m) in damages to NTP, a figure that could be increased if it were to be found that RIM had "wilfully" infringed the patents.
NTP filed a complaint in November 2001, alleging that certain RIM products infringed on patents held by NTP covering the use of radio-frequency wireless communications in e-mail systems.
RIM said it believed the jury verdict was wrong as both a matter of law and fact and was unduly prejudiced by errors in the court's pre-trial and trial rulings. The verdict is not final and that it is only one step in a continuing legal process that could take several years or more to finally resolve.
RIM has filed four lawsuits against Good Technology, citing a number of complaints including misappropriation of trade secrets and unfair competition.
In September, RIM sued handheld maker Handspring for patent infringement regarding the keyboard of Handspring's Treo device. That lawsuit has now been settled.
In 2001, RIM sued Glenayre Electronics for infringing an RIM patent entitled "System and method for pushing information from a host system to a mobile data communication device having a shared electronic address".
The company said the verdict does not affect the validity and enforceability of RIM's own patents.