The principles of the present invention provide the ability to flexibly change the delivery point and time for a mail item, while the item is en route. The recipient, sender, or mailer may flexibly change the delivery point of the item alone or in combination with each other. While an item is en route...http://www.google.fr/patents/US7647231?utm_source=gb-gplus-shareBrevet US7647231 - Flexible mail delivery system and method
