A vending machine system for printing postage stamps, the vending machine system includes an enclosed housing having a front panel with an aperture therein; a camera, mounted in the housing, for receiving through the aperture an image of at least one person and for creating an electronic image of the...http://www.google.com.hk/patents/US5923406?utm_source=gb-gplus-share專利 US5923406 - Personal postage stamp vending machine
