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3692246
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Patent number 3,692,246
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Issue date Sep 19, 1972
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3606175
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Patent number 3,606,175
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Issue date Sep 20, 1971
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3423796
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Patent number 3,423,796
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Issue date Jan 28, 1969
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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3385531
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Patent number 3,385,531
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Issue date May 28, 1968
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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3268954
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Patent number 3,268,954
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Issue date Aug 30, 1966
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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Patent number 2,890,493
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Issue date Jun 16, 1959
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Patent number 2,812,790
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Issue date Nov 12, 1957
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING