4. Metal treatment
  5. Stock
  6. Carburized or nitrided

Shuji Sameshima

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Method of producing piston ring

Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent

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Piston ring

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent

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Piston ring and combination of compression rings

Seal for a joint or juncture – Seal between relatively movable parts – Piston ring or piston ring expander or seat therefor
Reexamination Certificate

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Piston ring and process for manufacturing the same

Metal treatment – Stock – Carburized or nitrided
Patent

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Profile ID: LFUS-PAI-P-294041

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