Handok International holds U.S. and Korean patents
on Natural Zeolite Block and its manufacturing methods.
Patent on Natural Zeolite Block
(Korea, Patent No.10-2404200)
CERTIFICATE OF DESIGN RESIGTRATION
(Korea, Resigtration No.30-1197020)
NATURAL ZEOLITE BLOCK FOR IMPROVING WATER QUALITY AND METHOD FOR MANUFACTURING SAME
(US11,524,273BL)
CERTIFICATE OF DESIGN RESIGTRATION
(Korea, Resigtration No.30-1228444)