参考文献

KOWA CO., LTD.; Morimoto, Toshiharu; Koshizawa, Tomoaki; Watanabe, Gen; Ohgiya, Tadaaki; Yamasaki, Nao; Inoue, Noriyuki Patent: US2013/102621 A1, 2013 ; Location in patent: Paragraph 0281; 0282 ;