73228747
Aug 24, 1979
Jul 28, 1981
Irrigation Control Systems, Comprising Program Timers for Controlling a Series of Irrigation Outlets, Soil Moisture Sensors for Initiating and Terminating Irrigation Cycles, Vacuum Responsive Valves and Remote Control Valves, Sprinklers, Fittings, and Tubing, Sold as a Unit
Environmental Control Apparatus