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Metal-graphite brush
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Patent number 7,294,166
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Issue date Nov 13, 2007
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Tris Inc.
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Takayoshi Otani
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H01 - BASIC ELECTRIC ELEMENTS
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Copper-graphite brush
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Patent number 7,067,951
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Issue date Jun 27, 2006
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Tris Inc.
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Takayoshi Otani
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H01 - BASIC ELECTRIC ELEMENTS
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Metal-graphite brush
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Patent number 6,949,863
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Issue date Sep 27, 2005
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TRIS Inc.
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Takayoshi Otani
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H01 - BASIC ELECTRIC ELEMENTS
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Metal-graphite brush
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Patent number 6,755,882
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Issue date Jun 29, 2004
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TRIS Inc.
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Takayoshi Otani
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H01 - BASIC ELECTRIC ELEMENTS
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Metal-graphite brush
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Patent number 6,700,292
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Issue date Mar 2, 2004
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TRIS Inc.
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Takayoshi Otani
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H01 - BASIC ELECTRIC ELEMENTS
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Carbon commutator
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Patent number 6,259,183
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Issue date Jul 10, 2001
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TRIS Inc.
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Tokio Hotta
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H01 - BASIC ELECTRIC ELEMENTS
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74222487 - TRIS
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Serial number 74222487
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Registration number 1796639
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Filing date Nov 15, 1991
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Tris Kabushiki Kaisha
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7 - Machines and machine tools