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公开(公告)号：US3038786A
公开(公告)日：1962-06-12
申请号：US85983759
申请日：1959-12-16
Applicant: KIZO HIRATSUKA , SHIRO MATSUMURA , MASATSNGI MATSNDA , KIYOSHI TAKAGI , ZENICHIRO KASAWARA , TADAO OONO , TETSUYA ABE , NORIAKI OZAWA
Inventor： KIZO HIRATSUKA , SHIRO MATSUMURA , MASATSNGI MATSNDA , KIYOSHI TAKAGI , ZENICHIRO KASAWARA , TADAO OONO , TETSUYA ABE , NORIAKI OZAWA
IPC: C01B15/023
CPC classification number: C01B15/023
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