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Class Information
Number: 285/424
Name: Pipe joints or couplings > Materials > Sheet
Description: Subject matter which includes material originally in sheet form.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5267550 |
Assembly structure for an external body of a kitchen soot extractor |
Dec. 7, 1993 |
| 5253901 |
Duct reinforcement |
Oct. 19, 1993 |
| 5246256 |
Roll grooved pipe |
Sep. 21, 1993 |
| 5240294 |
Pipe coupling clamp with bolt pads and linear extending lugs |
Aug. 31, 1993 |
| 5213374 |
Coupling ring and method of making same |
May. 25, 1993 |
| 5199190 |
Universal appliance venting assembly |
Apr. 6, 1993 |
| 5199747 |
Connector assembly for double walled tubing |
Apr. 6, 1993 |
| 5195789 |
Slip lock connector assembly for joining sheet metal ducts |
Mar. 23, 1993 |
| 5176125 |
Assembly means of housing body of smoke exhauster |
Jan. 5, 1993 |
| 5165736 |
Corner profile for coupling channel members |
Nov. 24, 1992 |
| 5165730 |
Duct joining system |
Nov. 24, 1992 |
| 5158328 |
Universal duct elbow and connector plate |
Oct. 27, 1992 |
| 5145217 |
Universal dryer duct and vent |
Sep. 8, 1992 |
| 5135270 |
Apparatus for connecting the ends of a pair of oval duct sections |
Aug. 4, 1992 |
| 5133580 |
Butt connection between two air duct sections made sheet of metal |
Jul. 28, 1992 |
| 5133579 |
Extendible-contractible, flexible, helical conduit and coupling assembly |
Jul. 28, 1992 |
| 5129690 |
Apparatus for connecting the ends of a pair of oval duct sections |
Jul. 14, 1992 |
| 5129685 |
Connector system for air transfer ducts |
Jul. 14, 1992 |
| 5125198 |
Dual fitting chimney cap |
Jun. 30, 1992 |
| 5116083 |
Clamp for coupling and sealing pipe joints |
May. 26, 1992 |
| 5104159 |
Threadless coupling for pipes and an air-tight inner cylinder therefor |
Apr. 14, 1992 |
| 5090743 |
Compressible fitting and associated method |
Feb. 25, 1992 |
| 5080403 |
Apparatus for connecting a branch duct to another duct |
Jan. 14, 1992 |
| 5069484 |
Duct joining system |
Dec. 3, 1991 |
| 5069487 |
Flexible connector |
Dec. 3, 1991 |
| 5054823 |
Flange type duct connector |
Oct. 8, 1991 |
| 5026096 |
Axial force resisting pipe coupling |
Jun. 25, 1991 |
| 5022688 |
Flange type duct joint assembly and seal arrangement therefor |
Jun. 11, 1991 |
| 5015018 |
Duct connector |
May. 14, 1991 |
| 5005879 |
Corner bracket and interconnection system for ducting |
Apr. 9, 1991 |
| 4995648 |
Locking flange clip |
Feb. 26, 1991 |
| 4956948 |
Clog resistant gutter-downspout connection unit |
Sep. 18, 1990 |
| 4953899 |
Clamp assembly |
Sep. 4, 1990 |
| 4951975 |
Coupling for conduits |
Aug. 28, 1990 |
| 4941693 |
Connector for air ducts |
Jul. 17, 1990 |
| 4940264 |
Flange connection |
Jul. 10, 1990 |
| 4930815 |
Ring seal collar for air ducts |
Jun. 5, 1990 |
| 4929000 |
Multiple walled chimney |
May. 29, 1990 |
| 4902049 |
Structure having interconnected metal tubes |
Feb. 20, 1990 |
| 4900064 |
Connector for fiber duct systems |
Feb. 13, 1990 |
| 4881762 |
Duct connector for a circular duct |
Nov. 21, 1989 |
| 4880260 |
Method of joining pipes |
Nov. 14, 1989 |
| 4874191 |
Flue gas conduit connector |
Oct. 17, 1989 |
| 4867490 |
Circular duct connector |
Sep. 19, 1989 |
| 4865365 |
Air duct section having a connecting flange formed by bending up the ends of the air duct walls |
Sep. 12, 1989 |
| 4865357 |
Metal pipe coupling to accommodate a desired angle of connection between drainage pipe sections |
Sep. 12, 1989 |
| 4861631 |
Flexible connector material |
Aug. 29, 1989 |
| 4852913 |
Apparatus for repairing pipes |
Aug. 1, 1989 |
| 4846512 |
Protective cylinder for pipe covering material |
Jul. 11, 1989 |
| 4846147 |
Chimney liner system |
Jul. 11, 1989 |
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