52 Utility and 1 Design Patents
#1,567 in Tokyo
#7,044 in Japan
#35,280 in the World
rank by utility patentsForward Citations = 416
Company Filing History:

Mitsui Petrochemical Industries, Ltd.

4. 2 out of 54
Yokogawa Hokushin Electric Corp.
5. 1 out of 831,952 patents
Other
where one patent can have more than one assignee
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