A timing device monitors an estimated time of arrival (ETA) for an object in a process of traversing a predetermined range of distance by computing the estimated time of arrival based on a time the object has spent completing at least one interval during the course of traversing the distance. The computation...http://www.google.de/patents/US7571049?utm_source=gb-gplus-sharePatent US7571049 - Timing device, system and method for estimated time of arrival (ETA)