The present invention provides a unique system and method that facilitates navigating smoothly and gracefully through any type of content viewable on portable devices such as cell-phones, PDAs, and/or any other hybrids thereof. In addition, such navigation can be performed while preserving perspective...http://www.google.com.mx/patents/US7327349?utm_source=gb-gplus-sharePatent US7327349 - Advanced navigation techniques for portable devices
