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Patent number 5,944,045
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Issue date Aug 31, 1999
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Ransburg Corporation
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Harold T. Allen
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Patent number 5,746,831
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Issue date May 5, 1998
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Ransburg Corporation
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Harold T. Allen
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Patent number 5,632,816
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Issue date May 27, 1997
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Ransburg Corporation
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Harold T. Allen
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Backlit button by thermoformed cap process
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Patent number 5,198,283
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Issue date Mar 30, 1993
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Illinois Tool Works Inc.
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Ralph A. Hausler
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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