In Patent Bolt's miniseries covering future features coming to Microsoft's Surface tablet, we've presented a wide range of technologies. We began by covering Microsoft's next generation digital pen and quickly followed up with another report on how multi-touch and pen combination gestures would work together. In our third report we illustrated how twisting, tilting and shaking Microsoft's future tablets will initiate certain tablet functions. In today's fourth installment, we take a look at yet another Microsoft patent that clearly indicates their intent to bring fingerprint detection to Surface at some point in time. According to Microsoft, biometrics via Fingerprinting will act as a user's unique key for starting their devices and eventually work itself right into corporate boardrooms in a very unique way.