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Roll former
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Issue date Nov 12, 2019
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FAMOUS INDUSTRIES, INC.
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Charles Klinect
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Ductmaking apparatus
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Patent number 8,590,577
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Issue date Nov 26, 2013
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Mestek Machinery, Inc.
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Michael C. Borwig
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Ductmaking apparatus
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Patent number 8,276,425
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Issue date Oct 2, 2012
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Mestek Machinery, Inc.
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Michael C. Borwig
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Method of forming a tube
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Patent number 6,880,581
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Issue date Apr 19, 2005
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Weeks Peacock Quality Homes Pty. Ltd.
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Kevin William Weeks
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Duct finishing machine
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Patent number 4,497,189
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Issue date Feb 5, 1985
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Kenneth E. Larson
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Assembly of straight duct and transitions
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Patent number 4,424,618
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Issue date Jan 10, 1984
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Potomac Applied Mechanics, Inc.
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James H. Stubbings
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Pipe snapper machine and method
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Issue date Dec 18, 1979
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Rockford Machine Tool Co.
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Eugene S. Swanson
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Assembly of straight duct and transitions
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Patent number 4,111,143
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Issue date Sep 5, 1978
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Potomac Applied Mechanics, Inc.
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James Henry Stubbings
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3901174
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3726120
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3350751
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3304728
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F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
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3260636
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Issue date Jul 12, 1966
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3217501
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Patent number 3,217,501
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Issue date Nov 16, 1965
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL