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Movable sealer

by FARMER GEOFFREY A
Year of Publication 07.02.2012
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Patent
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Writing boards

by Kinsman Douglas
Year of Publication 09.08.2016
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Patent
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PENCIL LEAD

by BANZAI, Satoru, ARAI, Hiroyuki
Year of Publication 18.03.2020
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Patent
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Pencil eraser adapter

by ANDERSON PHILIP
Year of Publication 12.04.2016
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Patent