17 Utility and 2 Design Patents
#2,928 in Yokohama
#44,900 in Japan
#207,884 in the World
rank by utility patentsForward Citations = 60
Company Filing History:
Sei Optifrontier Co., Ltd.


4. 1 out of 1
Sei Optifronter Co., Ltd.
where one patent can have more than one assignee
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