Patents/Assignees

NIPPON PISTON RING CO., Ltd.

6 patents in portfolio

US11946010utility2024
Sliding Member, Manufacturing Method Thereof, and Coating Film
0 cites
US11873780utility2024
Combined Oil Ring
0 cites
US11846009utility2023
Hard Particle Powder for Sintered Body
0 cites
US11739840utility2023
Piston Ring
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US11692248utility2023
Sliding Member
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US11549408utility2023
Iron-based Sintered Alloy Valve Seat for Internal Combustion Engine
0 cites