69 Utility and 9 Design Patents
#323 in Yokohama
#3,824 in Japan
#20,439 in the World
rank by utility patentsForward Citations = 143
Company Filing History:



Sumitomo Metal Industries, Inc.

Nippon Steel & Sumitomo Metal Corporation
4. 1 out of 328
Sumitomo Electric Device Innovations, Inc.
where one patent can have more than one assignee
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