47 Utility and 1 Design Patents
#1,998 in Tokyo
#8,825 in Japan
#43,167 in the World
rank by utility patentsForward Citations = 200
Company Filing History:


Tokyo Ohka Kogyo Co., Ltd.
4. 3 out of 7,523

5. 2 out of 35,634

where one patent can have more than one assignee
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