3 Utility Patents
#2,665 in Ibaraki
#233,661 in Japan
Forward Citations = 6
Company Filing History:
Sumitomo Metal Industries, Inc.
Shinagawa Refractories Co., Ltd.
Kurosaki Refractories Co., Ltd.
4. 1 out of 4
Sumitomo Metal Industries Co., Ltd.
where one patent can have more than one assignee
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