SanDisk is suing 25 companies, including South Korean giant LG Electronics, for allegedly infringing patents used in removable flash storage products including MP3 players and USB flash drives.
The chipmaker has also filed a complaint with the US International Trade Commission (ITC), asking to have defendants in the cases barred from importing products into the US.
The suit also covers makers of CompactFlash cards, multimedia cards and other removable flash storage products used in digital cameras, mobile phones and other gadgets, and names as defendants companies from around the world, such as Japan's Buffalo, Acer affiliate Apacer, and Kingston Technology.