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Flat-topped wave-board panel
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Patent number 5,290,621
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Issue date Mar 1, 1994
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Her Majesty the Queen in right of Canada as represented by the Minister of Fo...
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Lars Bach
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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3575768
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Patent number 3,575,768
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Issue date Apr 20, 1971
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
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3430476
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Patent number 3,430,476
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Issue date Mar 4, 1969
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3402092
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Patent number 3,402,092
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Issue date Sep 17, 1968
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B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD