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Manufacturing fiberboard ducts
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Patent number 4,528,053
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Issue date Jul 9, 1985
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Mark J. Auer
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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Manufacturing fiberboard ducts
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Patent number 4,461,664
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Issue date Jul 24, 1984
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Mark J. Auer
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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3791268
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Patent number 3,791,268
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Issue date Feb 12, 1974
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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3383990
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Patent number 3,383,990
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Issue date May 21, 1968
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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3326096
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Patent number 3,326,096
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Issue date Jun 20, 1967
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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3309970
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Patent number 3,309,970
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Issue date Mar 21, 1967
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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2704966
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Patent number 2,704,966
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Issue date Mar 29, 1955
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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2249859
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Patent number 2,249,859
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Issue date Jul 22, 1941
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2138766
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Patent number 2,138,766
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Issue date Nov 29, 1938
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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1552695
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Patent number 1,552,695
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Issue date Sep 8, 1925
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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1495799
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Patent number 1,495,799
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Issue date May 27, 1924
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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1355398
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Patent number 1,355,398
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Issue date Oct 12, 1920
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD