18 Utility Patents
#134 in Tochigi
#42,124 in Japan
#195,457 in the World
Forward Citations = 145
Company Filing History:
Nippon Piston Ring Co., Ltd.

where one patent can have more than one assignee
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#134 in Tochigi
#42,124 in Japan
#195,457 in the World
Company Filing History:

Get your Inventor Badge Today