147 Utility and 1 Design Patents
#27 in Kawasaki
#554 in Japan
#4,155 in the World
rank by utility patentsForward Citations = 1,729
Company Filing History:



Tokyo Ohka Kogyo Co., Ltd.


4. 22 out of 58,116

5. 7 out of 2,046

where one patent can have more than one assignee
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