29 Utility Patents
#4,171 in Tokyo
#20,089 in Japan
#91,987 in the World
Forward Citations = 222
Company Filing History:
Showa Shell Sekiyu K.k.
Showa Shell Sekiyu Kabushiki Kaisha
Nippondenso Co., Ltd.
4. 1 out of 19,319
5. 1 out of 15
Teikoku Chemical Industry Co., Ltd.
where one patent can have more than one assignee
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