74137618
Feb 8, 1991
Jan 4, 1994
electronic controllers for waste water purification units, electronic solenoids for controlling waste water purification units, and float switches for use with waste water purification units
Electrical and Scientific Apparatusresidential, commercial and industrial sewage and waste water purification units; hydropneumatic tanks, PVC pipe and drip tubing; valves for use in waste water purification units and water filters for use in waste water purification units
Environmental Control Apparatus