Yan, who graduated from the Department of Industrial Design at Tatung University, found that iRobot had over ten patents for Roomba's structure, parts, function and programming.
從結構、內部零件、功能到程式設計，大同工學院（現大同大學）工業設計系畢業的燕成祥估計，倫巴大概有十幾項專利。