8 Utility and 1 Design Patents
#19,162 in Tokyo
#105,167 in Japan
#499,816 in the World
rank by utility patentsForward Citations = 41
Company Filing History:
Nippon Steel & Sumitomo Metal Corporation
Hitachi, Ltd.

4. 1 out of 21,351

5. 1 out of 2,861

where one patent can have more than one assignee
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