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Vacuum insulating unit
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Patent number 5,124,185
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Issue date Jun 23, 1992
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PPG Industries, Inc.
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Thomas P. Kerr
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Sheet transporter
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Patent number 4,302,042
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Issue date Nov 24, 1981
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PPG Industries, Inc.
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Thomas P. Kerr
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B66 - HOISTING LIFTING HAULING