37 Utility Patents
#38 in Utsunomiya
#13,823 in Japan
#65,496 in the World
Forward Citations = 323
Company Filing History:
Nippon Piston Ring Co., Ltd.
Toyota Jidosha Kogyo Kabushiki Kaisha
Nippon Piston Ring Kabushiki Kaisha
4. 1 out of 3
Kabushiki Kaisha Tokiwa Seisakusho
where one patent can have more than one assignee
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