71599740
Jun 26, 1950
Aug 11, 1953
LIQUID TREATING EQUIPMENT FOR INDUSTRIAL APPLICATION ONLY-NAMELY, WATER SOFTENERS OF THE TYPE WHEREIN WATER IS CIRCULATED THROUGH A TANK CONTAINING ZEOLITE OR OTHER WATER SOFTENING AGENT, WATER DEMINERALIZERS OF THE ION-EXCHANGE TYPE, GRAVITY AND PRESSURE FILTERS, AUTOMATIC AND MANUAL FILTERS
Natural Agricultural Products