Provided are a method and system for a biometric sensing apparatus. An apparatus includes an input signal generator configured to produce an activation signal. Also includes is a piezoelectric ceramic sensor having a plurality of piezoelectric ceramic elements arrayed and spaced to (i) receive the activation...http://www.google.es/patents/US7141918?utm_source=gb-gplus-sharePatente US7141918 - Method for obtaining biometric data for an individual in a secure transaction
Method for obtaining biometric data for an individual in a secure transaction
