申请人 |
SAGAMI CHEMICAL RESEARCH CENTER;CENTRAL CLASS COMPANY LIMITED;HODOGAYA CHEMICAL CO. LTD.;NIPPON SODA COMPANY LIMITED;NISSAN CHEMICAL INDUSTRIES LIMITED;TOYO SODA MANUFACTURING CO. LTD. |
发明人 |
TAGAWA, MICHITO;WADA, MASAKATSU;YAMADA, MASAYUKI;YOKOYAMA, MIDORI;NUMAO, NAGANORI |