An irrigation system for controlling a number of control valves (104) is disclosed. The valves (104) control the flow of water in a corresponding branch pipe (102) leading from a common supply pipe (101). The system uses wireless transmission of control signals to operate a control unit (115) which operates...http://www.google.es/patents/US5333785?utm_source=gb-gplus-sharePatente US5333785 - Wireless irrigation system
