I want to know the answer to the following question:
On whose behalf did Pat-rights take Apple to court?
All the background I'm provided with is that "In 2005, Apple faced two lawsuits claiming patent infringement by the iPod line and its associated technologies: Advanced Audio Devices claimed the iPod line breached its patent on a "music jukebox", while a Hong Kong-based IP portfolio company called Pat-rights filed a suit claiming that Apple's FairPlay technology breached a patent issued to inventor Ho Keung Tse.". Is that enough to answer the question?
Answer: yes