申请人 |
NIPPON KOKAN K.K.;TOYO INK MFG. CO., LTD., TOKIO/TOKYO, JP |
发明人 |
ISHIKAWA, HIROSHI C/O PATENT DEPT.;TAKANO, HIROSHI C/O PATENT DEPT., CHIYODA-KU TOKYO, JP;OHTOMO, RYOSUKE;HOSHINO, YOSHINORI, KAWAGOE CITY SAITAMA PREF., JP;OHYAMA, TARO, HOYA CITY TOKYO, JP |