34 Utility Patents
#853 in Osaka
#16,035 in Japan
#75,436 in the World
Forward Citations = 769
Company Filing History:


Sei Optifrontier Co., Ltd.
4. 2 out of 15
Japan Communication Accessories Manufacturing Co., Ltd.
5. 2 out of 46
Sumitomo Electric Optifrontier Co., Ltd.
where one patent can have more than one assignee
Get your Inventor Badge Today