Assignee
ENGEL IND INC
US·16 granted patents·367 citations·filing 1976–2002
Top patents by PatentIndex Score
16 records- 0190US6471256B1Companion duct flangesENGEL IND INC·Filed 2000·Granted Oct 29, 2002·49 cites·16 claims
- 0288US6997026B2Quick change metal stud to hemmed track roll forming systemENGEL IND INC·Filed 2002·Granted Feb 14, 2006·24 cites·16 claims
- 0384US6345524B1Rotatable head assembly for sheet metal coil straightener deviceENGEL IND INC·Filed 2000·Granted Feb 12, 2002·18 cites·25 claims
- 0484US4579375ASheet metal duct system having integral transverse flangesENGEL IND INC·Filed 1984·Granted Apr 1, 1986·59 cites·5 claims
- 0583US6810570B2Method of attaching a connector element to a duct flangeENGEL IND INC·Filed 2002·Granted Nov 2, 2004·27 cites·15 claims
- 0680US5163311ARollformer for variable width edge profilesENGEL IND INC·Filed 1991·Granted Nov 17, 1992·37 cites·7 claims
- 0768US5353616APittsburgh seam closer having single seaming rollENGEL IND INC·Filed 1991·Granted Oct 11, 1994·31 cites·10 claims
- 0864US6081985AMethod of inserting corner members in channel-shaped flanges of a ductENGEL IND INC·Filed 1998·Granted Jul 4, 2000·16 cites·7 claims
- 0962US4038128AInsulation blanket shearing and applying machine for ductwork and the likeENGEL IND INC·Filed 1976·Granted Jul 26, 1977·13 cites·9 claims
- 1060US5358013ADeflection-resistant safety flange for integrally-flanged duct sectionsENGEL IND INC·Filed 1993·Granted Oct 25, 1994·26 cites·2 claims
- 1159US6292991B1Apparatus and method for inserting corner members in channel-shaped flanges of a ductENGEL IND INC·Filed 2000·Granted Sep 25, 2001·8 cites·12 claims
- 1257US4024784ARotary slitting shear having separately powered cuttersENGEL IND INC·Filed 1976·Granted May 24, 1977·10 cites·2 claims
- 1354US4185487ASide access cleat former apparatus and method of useENGEL IND INC·Filed 1978·Granted Jan 29, 1980·15 cites·2 claims
- 1453US6047466AApparatus and method for inserting angle plates in channel shaped flanges of a ductENGEL IND INC·Filed 1997·Granted Apr 11, 2000·16 cites·3 claims
- 1552US6263557B1Apparatus and method for inserting angle plates in channel shaped flanges of a ductENGEL IND INC·Filed 2000·Granted Jul 24, 2001·5 cites·6 claims
- 1639US5462089ASheet metal duct construction providing preliminary support for corner crimpingENGEL IND INC·Filed 1994·Granted Oct 31, 1995·13 cites·1 claims
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