34 Utility Patents
#26 in Sendai
#15,468 in Japan
#71,603 in the World
Forward Citations = 334
Company Filing History:
Sumitomo Metal Industries, Inc.
Nippon Steel & Sumitomo Metal Corporation

4. 1 out of 240
Sumitomo Special Metals Co., Ltd.
5. 1 out of 1
Sumikin Precision Forge Inc.
where one patent can have more than one assignee
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