23 Utility Patents
#6,002 in Tokyo
#29,788 in Japan
#138,051 in the World
Forward Citations = 94
Company Filing History:
Nippon Steel Corporation
Nippon Steel & Sumikin Materials Co., Ltd.

4. 4 out of 1,098
Nippon Steel & Sumitomo Metal Corporation
5. 2 out of 15,722

where one patent can have more than one assignee
Get your Inventor Badge Today