16 Utility Patents
#9,458 in Tokyo
#48,906 in Japan
#226,974 in the World
Forward Citations = 96
Company Filing History:

Tokyo Ohka Kogyo Co., Ltd.

4. 2 out of 21,590

5. 2 out of 6,850
Ciba-geigy Corporation
where one patent can have more than one assignee
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