Back in December, 2008, Bose announced that it had settled little-known litigation with a similarly little-known company: Phitek, the manufacturer behind well-respected active noise-canceling headphones sold by Audio Technica, Creative Labs, and “pretty much all the branded ANC headphones” except Bose’s and Sony’s. As it turned out, Bose had accused Phitek of infringing patents on its QuietComfort headphones, and while no other…