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Piston ring
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Patent number 6,508,473
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Issue date Jan 21, 2003
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Teikoku Piston Ring Co., Ltd.
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Shoji Tanaka
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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Sliding member
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Patent number 6,149,162
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Issue date Nov 21, 2000
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Teikoku Pistong Ring Co., Ltd.
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Shoji Tanaka
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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Sliding member with hard ternery film
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Patent number 5,601,293
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Issue date Feb 11, 1997
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Teikoku Piston Ring Co., Ltd.
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Hiroto Fukutome
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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