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2083210
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Patent number 2,083,210
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Issue date Jun 8, 1937
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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1614643
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Patent number 1,614,643
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Issue date Jan 18, 1927
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD