216 Utility and 3 Design Patents
#52 in Kanagawa
#180 in Japan
#1,783 in the World
rank by utility patentsForward Citations = 1,066
Company Filing History:


Tokyo Ohka Kogyo Co., Ltd.
4. 6 out of 1,156

5. 5 out of 317

where one patent can have more than one assignee
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