108 Utility and 1 Design Patents
#311 in Tokyo
#1,288 in Japan
#8,306 in the World
rank by utility patentsForward Citations = 299
Company Filing History:



4. 15 out of 313
Dowa Electronics Materials Co., Ltd.
5. 10 out of 33
Sanwa Denki Kogyo Co., Ltd.
where one patent can have more than one assignee
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