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Rolling bearing unit
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Patent number 6,971,799
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Issue date Dec 6, 2005
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NSK Ltd.
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Yukio Sato
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3868839
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Patent number 3,868,839
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Issue date Mar 4, 1975
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3736795
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Patent number 3,736,795
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Issue date Jun 5, 1973
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2342374
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Patent number 2,342,374
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Issue date Feb 22, 1944
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2303596
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Patent number 2,303,596
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Issue date Dec 1, 1942
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...