 One theory to overcome these current limitations is to cover small particles with the nanotubes and suspend the nanotube-covered particles in a medium such as paint, which can then be applied to a surface, like a stealth aircraft.In 2010, Lockheed Martin Corporation applied for a patent for just such a CNT based radar absorbent material, which was reassigned and granted to Applied NanoStructure Solutions, LLC in 2012.Some believe that this material is incorporated in the F-35 Lightning II.