3 Utility Patents
#2 in Oomuta
#233,661 in Japan
Forward Citations = 35
Company Filing History:
Mitsui Coke Co. Ltd.
New Japan Chemical Co., Ltd.

4. 1 out of 43
Mitsui Mining Co., Ltd.
5. 1 out of 1
Toko Kasei Ltd.
where one patent can have more than one assignee
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