14 Utility Patents
#3,605 in Yokohama
#58,129 in Japan
#270,606 in the World
Forward Citations = 25
Company Filing History:

Sumitomo Electric Optifrontier Co., Ltd.
Sei Optifrontier Co., Ltd.
4. 1 out of 28

5. 1 out of 7
Fujitu Limited
where one patent can have more than one assignee
Get your Inventor Badge Today