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Automatic transfer switch
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Patent number 4,804,933
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Issue date Feb 14, 1989
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Brown Industrial Gas, Inc.
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James A. Becker
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H01 - BASIC ELECTRIC ELEMENTS
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3742157
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Patent number 3,742,157
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Issue date Jun 26, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3600528
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Patent number 3,600,528
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Issue date Aug 17, 1971
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS