http://www.thefirearmblog.com/blog/2014 ... Newsletter
In 2009 Heckler & Koch (USA) sued German Sport Guns GmbH (GSG), who manufactured the GSG GSG-5 .22 rifle, and American Tactical Imports (ATI) who imported the GSG-5 into the USA. They successfully argued that the GSG-5 infringed upon their design patents for the H&K MP5. They took court action soon after licensing the design to Umarex who were designing a competing MP5-patterned .22 rifle. GSG paid a settlement of $300,000 and agreed to modify the design of the GSG-5 so it looked less like an MP5.
But, things just got interesting! GSG and ATI are now suing Heckler & Koch GmbH (Germany) and Heckler & Koch (USA) for $16.5 million in punitive damages. GSG claims they now have proof that H&K did not own the rights to the MP5 design when they sued GSG and “forced GSG into a settlement”