13 Utility Patents
#1 in Shimotsuga
#61,885 in Japan
#285,181 in the World
Forward Citations = 102
Company Filing History:
Nippon Piston Ring Co., Ltd.


where one patent can have more than one assignee
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#1 in Shimotsuga
#61,885 in Japan
#285,181 in the World
Company Filing History:


Get your Inventor Badge Today