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
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →