温州宏丰：近日收到由国家知识产权局颁发的实用新型专利证书

Group 1 - Wenzhou Hongfeng Electric Alloy Co., Ltd. and its subsidiary Zhejiang Hongfeng Copper Foil Co., Ltd. have recently received utility model patent certificates from the National Intellectual Property Administration [1] - The patents include "an adjustment device for the induction coil of an induction welder" and "a conductive device for a foil-making machine" [1]