5 Utility Patents
#916 in Okazaki
#162,610 in Japan
#827,581 in the World
Forward Citations = 2
Company Filing History:

Nippon Piston Ring Co., Ltd.
where one patent can have more than one assignee
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#916 in Okazaki
#162,610 in Japan
#827,581 in the World
Company Filing History:

Get your Inventor Badge Today