77 Utility and 5 Design Patents
#746 in Tokyo
#3,038 in Japan
#16,805 in the World
rank by utility patentsForward Citations = 618
Company Filing History:



4. 5 out of 49
Sumitomo Electric Optifrontier Co., Ltd.
5. 3 out of 3
Kyoueisenzai Kabushikigaisha
where one patent can have more than one assignee
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