28 Utility and 2 Design Patents
#4,634 in Tokyo
#22,038 in Japan
#102,658 in the World
rank by utility patentsForward Citations = 201
Company Filing History:



4. 2 out of 475
Denki Kagaku Kogyo Kabushiki Kaisha
5. 1 out of 163,957

where one patent can have more than one assignee
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