Tengen, a subsidiary of Atari Games, was initially created to port coin-op arcade games onto home platforms like the NES. Tengen hardware engineers sought to reverse engineer the NES CIC through a chemical peel, but when those efforts failed to generate a complete bypass solution the company decided to become a Nintendo licensee. Upon becoming official, Atari Games lawyers sought out a loophole in order to obtain the code for the 10NES program via the US Copyright Office. By stating that Atari was a defendant in a 10NES program infringement case and therefore was privy to that information, however, no such lawsuit existed at the time of the request.