72 Utility and 9 Design Patents
#300 in Yokohama
#3,537 in Japan
#19,120 in the World
rank by utility patentsForward Citations = 147
Company Filing History:

Sumitomo Metal Industries, Inc.
Nippon Steel & Sumitomo Metal Corporation
4. 1 out of 334
Sumitomo Electric Device Innovations, Inc.
5. 1 out of 46
Sumitomo Electric Optifrontier Co., Ltd.
where one patent can have more than one assignee
Get your Inventor Badge Today