72183073
Dec 16, 1963
Nov 8, 1966
VARIOUS FORMS OF MECHANICAL MACHINERY RELATED TO WATER CONDITIONING IN SANITARY AND POTABLE WATER FIELDS AND HEREINAFTER DESCRIBED AS VACUUM DIATOMACEOUS EARTH PACKAGE FILTER UNITS, PRESSURE DIATOMACEOUS EARTH PACKAGE FILTER UNITS, RAPID SAND FILTERS, INDUCED AND FORCED DRAFT AERATORS, FILTER BODY FEEDERS, PACKAGE WATER SOFTENERS, MANUFACTURED MECHANICAL-HYDRAULIC PRODUCTS RELATED TO THE MOVEMENT OR REMOVAL OF FOREIGN MATTER, MINERALS AND BACTERIA IN PUBLIC OR PRIVATE POTABLE WATER SUPPLIES, PUBLIC OR PRIVATE SWIMMING WATER SUPPLIES OR WHERE ANY WATER OF HIGH QUALITY IS REQUIRED
Natural Agricultural Products