16 Utility Patents
#3,105 in Yokohama
#48,273 in Japan
#222,980 in the World
Forward Citations = 87
Company Filing History:
Nippon Kokan Kabushiki Kaisha

Kokan Mining Co., Ltd.
4. 1 out of 1
Japan & Nippon Furnace Kogyo Kaisha, Ltd.
5. 1 out of 1
Irox-nkk Co., Ltd.
where one patent can have more than one assignee
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