38 Utility and 1 Design Patents
#2,923 in Tokyo
#13,133 in Japan
#62,393 in the World
rank by utility patentsForward Citations = 122
Company Filing History:

Shinagawa Refractories Co., Ltd.

4. 2 out of 3,525
Nippon Steel Corporation
5. 2 out of 111

where one patent can have more than one assignee
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