20 Utility Patents
#7,281 in Tokyo
#36,582 in Japan
#169,030 in the World
Forward Citations = 83
Company Filing History:

Nippon Steel Corporation
Nippon Steel & Sumitomo Metal Corporation
4. 5 out of 929
Sumitomo Metal Industries, Inc.
5. 1 out of 16,453

where one patent can have more than one assignee
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