Patent 印刷配線板 豊田啓孝, 五百旗頭健吾, 林星小雨, 金子俊之, 内藤政則, 上原利久 Application no. CN ZL 201780046116.0 Date applied Jul 20, 2017 Patent/Registration no. CN ZL 201780046116.0 Date registered Apr 23, 2021 Date issued