71502964
May 29, 1946
Apr 14, 1953
WATER SOFTENING UNITS COMPRISING CONTAINERS FOR ZEOLITE CRYSTALS ADAPTED TO BE CONNECTED IN PLUMBING LINES, AND REGENERATING EQUIPMENT ALSO ADAPTED TO BE CONNECTED IN PLUMBING LINES FOR RESTORING THE WATER SOFTENING ACTION OF SUCH WATER SOFTENING UNITS
Natural Agricultural Products