27 Utility and 1 Design Patents
#4,887 in Tokyo
#23,296 in Japan
#108,395 in the World
rank by utility patentsForward Citations = 477
Company Filing History:
Tokyo Ohka Kogyo Co., Ltd.
Tokyo Denshi Kagaku Kabushiki Kaisha
Tokyo Denshi Kagaku Co., Ltd.
4. 2 out of 23
Tokyo Ohka Kogyo Kabushiki Kaisha
5. 1 out of 25,493

where one patent can have more than one assignee
Get your Inventor Badge Today