52 Utility Patents
#1,634 in Tokyo
#7,192 in Japan
#35,833 in the World
Forward Citations = 209
Company Filing History:


Nippon Steel & Sumitomo Metal Corporation
4. 5 out of 929
Sumitomo Metal Industries, Inc.
5. 4 out of 832,540 patents
Other
where one patent can have more than one assignee
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