22 Utility Patents
#1,697 in Osaka
#31,771 in Japan
#147,163 in the World
Forward Citations = 232
Company Filing History:
Sakai Chemical Industry Co., Ltd.
Hirose Manufacturing Co., Ltd.

4. 5 out of 58
Petroleum Energy Center
5. 3 out of 1,326

where one patent can have more than one assignee
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