5 Utility Patents
#8,379 in Yokohama
#162,438 in Japan
#826,260 in the World
Forward Citations = 20
Company Filing History:

Sei Optifrontier Co., Ltd.
Japan Communication Accessories Manufacturing Co., Ltd.
4. 1 out of 46
Sumitomo Electric Optifrontier Co., Ltd.
5. 1 out of 28

where one patent can have more than one assignee
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