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Modular permanent magnet chuck
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Patent number 7,161,451
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Issue date Jan 9, 2007
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GM Global Technology Operations, Inc.
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Chi-Hung Shen
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Reconfigurable workholding fixture
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Patent number 6,877,729
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Issue date Apr 12, 2005
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General Motors Corporation
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Yhu-Tin Lin
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Reconfigurable workholding fixture
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Patent number 6,644,637
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Issue date Nov 11, 2003
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General Motors Corporation
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Chi-Hung Shen
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Drill with improved wear inserts
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Patent number 5,038,641
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Issue date Aug 13, 1991
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General Motors Corporation
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Chi-Hung Shen
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR