21 Utility Patents
#2,291 in Yokohama
#34,149 in Japan
#157,948 in the World
Forward Citations = 447
Company Filing History:
Nippon Oil Company
Nippon Oil Corporation

4. 3 out of 331
Jx Nippon Oil Energy Corporation
5. 1 out of 832,627 patents
Other
where one patent can have more than one assignee
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