An apparatus and system, preferably mounted on a service vehicle, provides synchronized application of fluid materials, either solid or liquid, to a vehicle travel surface in proportional amounts or spatially distributed proportions in response to user defined requirements and/or operation of a vehicle...http://www.google.com/patents/US5904296?utm_source=gb-gplus-sharePatent US5904296 - Apparatus and system for synchronized application of one or more materials to a surface from a vehicle and control of a vehicle mounted variable positions snow removal device
