35 Utility and 1 Design Patents
#805 in Kawasaki
#14,821 in Japan
#69,041 in the World
rank by utility patentsForward Citations = 845
Company Filing History:
Tokyo Ohka Kogyo Co., Ltd.
Tokyo Ohka Kogyo Kabushiki Kaisha
Tokyo Denshi Kagaku Kabushiki Kaisha
4. 3 out of 7
Tokyo Denshi Kagaku Co., Ltd.
5. 1 out of 3
Photopoly Ohka Co., Ltd.
where one patent can have more than one assignee
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