温州宏丰(300283.SZ)：前期做了碳化硅项目研究工作，形成1项发明专利

Group 1 - The company, Wenzhou Hongfeng (300283.SZ), has conducted research on silicon carbide projects and has developed one invention patent [1] - Currently, the company has not initiated mass production or application of the silicon carbide project [1]