In 2000, Alex Breton was approached to create an invention by Europe’s largest rubber-stamp company seeking a way to link with the digital world. Rather than creating a new rubber-stamp, Breton produced what is now the world’s smallest handheld printer, the PrintBrush. The device is capable of printing on any surface, does not require paper and weighs less than nine ounces. It achieves the function of a rubber stamp - replicating content on multiple surfaces anywhere, anytime - while allowing the image or message to be changed instantly.
While it took ten years to perfect the original model, it quickly provoked interest in Europe. A newer model, A4, which will print color and contain a camera for better printing of images, is set to release 2012.
Source - 2011 Invention Awards: A Magic Wand for Printing, PopSci.com