19 Utility Patents
#7,782 in Tokyo
#39,277 in Japan
#181,667 in the World
Forward Citations = 1,138
Company Filing History:


Nippon Piston Ring Co., Ltd.
4. 1 out of 339

5. 1 out of 373

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#7,782 in Tokyo
#39,277 in Japan
#181,667 in the World
Company Filing History:




Get your Inventor Badge Today