| Patents for F16L 9 - Rigid pipes (18,006) |
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| 01/11/1994 | US5277455 Plastic lined dual containment piping system |
| 01/06/1994 | WO1994000669A1 Method and apparatus for inspecting subsurface environments |
| 01/06/1994 | CA2138013A1 Method and apparatus for inspecting subsurface environments |
| 01/05/1994 | EP0577409A1 Pipe-like fiber-reinforced plastic structural material and method of manufacturing the same |
| 01/05/1994 | EP0576733A1 Multilayered metal pipe and process for producing it |
| 01/05/1994 | DE4221926A1 Gas delivery pipe of one-piece plastic construction - is strongly expandable and compressible in direction of longitudinal axis without noticeable tensions inside it |
| 01/05/1994 | DE4221568A1 Thermoplastic tube with antistatic equipment - has internal longitudinal strip of electroconductive thermoplastic machined into tube wall |
| 01/05/1994 | DE4220418C1 Cylinder profile with non-round shape - is made by casting material held between walls inside shaped mould |
| 01/05/1994 | CN2152128Y Metal pipe with filler |
| 01/04/1994 | US5275240 Method and apparatus for preventing casing damage due to formation compaction |
| 12/23/1993 | WO1993025835A1 Multi-layer fuel and vapor tube |
| 12/22/1993 | EP0429506B1 Spiral-wound tube |
| 12/15/1993 | EP0574371A1 Flexible hose |
| 12/09/1993 | WO1993024299A1 Tubular laminate and production thereof |
| 12/05/1993 | CA2097250A1 Flexible hose |
| 11/30/1993 | US5266370 Centrifugally cast pipe |
| 11/30/1993 | US5265793 Small thick-walled composite metal tubing and process of producing the same |
| 11/24/1993 | CN2147407Y Sandwich thermo-insulated pipe line |
| 11/23/1993 | US5263794 Environmentally safe underground piping system |
| 11/23/1993 | CA1324584C Tubing with inside oxide layer |
| 11/18/1993 | DE4216090A1 Duo-pipe exhaust system for vehicle - uses sliding seat to form connection between two sections of inner pipe |
| 11/17/1993 | CN2146634Y Wear-resistant composite structure tube |
| 11/17/1993 | CN2146633Y Anti-electrostatic fire-resistant glass fibre reinforced and plastics compound tube |
| 11/11/1993 | WO1993022593A1 Method for manufacturing a structural element and the structural element |
| 11/10/1993 | EP0569101A1 Composite part comprising at least two polymer sections, and process for its manufacture |
| 11/09/1993 | CA2095714A1 Composite part comprising at least two polymer sections, and process for its manufacture |
| 11/03/1993 | EP0567947A1 Conduit of hose or pipe made of several layers of polymers |
| 11/03/1993 | EP0567667A1 Extruded plastic-metal compound pipe for installations |
| 10/28/1993 | WO1993021466A1 Multi-layer fuel and vapor tube |
| 10/21/1993 | DE4212648A1 Pipe with banded, wound pipe wall - has each winding with fork and fixture element including contoured sealing face |
| 10/19/1993 | US5253901 Duct reinforcement |
| 10/19/1993 | US5253680 Duplex metal pipe for damping |
| 10/14/1993 | WO1993020382A1 Metal pipe and process for producing the same |
| 10/14/1993 | WO1993020373A1 Pipes suitable for advanced gas distribution systems |
| 10/14/1993 | WO1993020372A1 Secondary containment flexible underground piping system |
| 10/14/1993 | WO1993019927A1 Thermoplastic syntactic foam pipe insulation |
| 10/14/1993 | CA2131916A1 Thermoplastic syntactic foam pipe insulation |
| 10/06/1993 | CN2143281Y Steel pipe lining with polymer mixture |
| 10/05/1993 | CA1322643C Extended semi-cristallin plastic tubing with thermally enhanced cold impact and traction strength, and fabrication process thereof |
| 09/30/1993 | WO1993019320A1 Water conserving wastewater disposal system |
| 09/30/1993 | CA2131698A1 Water conserving wastewater disposal system |
| 09/29/1993 | CN2142913Y Steel-plastic integral-bound corrosion-proof pipe and container |
| 09/29/1993 | CN2142912Y Fiber-reinforced draw-extrude plastic pipe |
| 09/21/1993 | US5246256 Roll grooved pipe |
| 09/08/1993 | EP0559445A1 Fuel transfer tube |
| 09/08/1993 | CN2141859Y Fibre winder |
| 09/02/1993 | WO1993017267A1 Double-walled construction of composite material tube, method for manufacturing the same, and device therefor |
| 09/02/1993 | WO1993017266A1 Environmentally safe underground piping system |
| 09/02/1993 | WO1993017176A1 Method and apparatus for manufacturing and laying out an umbilical |
| 09/02/1993 | WO1993016947A1 Plastic core tube having ring-shaped corrugations |
| 09/02/1993 | CA2130191A1 Environmentally safe underground piping system |
| 09/02/1993 | CA2109300A1 Double-wall composite pipe and coupling structure assembly and method and apparatus for making same |
| 09/01/1993 | EP0558373A2 Fuel transporting hose |
| 09/01/1993 | EP0558344A1 Apparatus for joining precast concrete units |
| 09/01/1993 | EP0558071A1 Coaxial pipe |
| 09/01/1993 | CN1075786A Wearproof composite structure pipe and its manufacturing method |
| 08/27/1993 | CA2090520A1 Shear bolt connected precast concrete units |
| 08/25/1993 | CN1075447A Ribbed pressure-resistant plastic tube |
| 08/24/1993 | US5238384 Apparatus for producing a composite pipe in a rotating drum |
| 08/19/1993 | WO1993016313A1 Channel system with a cross-section with rounded corners and method for manufacturing elements therein |
| 08/19/1993 | WO1993015785A1 Kink resistant tubing apparatus |
| 08/17/1993 | US5236018 To extend the drilling column |
| 08/05/1993 | DE4202514A1 Plastics and metal tubing system with joints - has embossed sections at end of metal tubes pressing into plastics parts |
| 08/04/1993 | EP0553500A1 Mono- or multilayered plastic vehicle conduit fabricated by coextrusion |
| 08/04/1993 | EP0553489A1 Mono- or multilayered plastic vehicle conduit fabricated by coextrusion |
| 07/29/1993 | DE4202079A1 Exhaust for vehicle IC engine - has inner and outer pipes spaced by thin walled metal membrane |
| 07/22/1993 | WO1993014546A1 Prelubricated duct |
| 07/20/1993 | CA1320455C Composite material tubing with little sensitivity to elongation variation under the effect of internal pressure |
| 07/15/1993 | DE4200611A1 Exhaust gas manifold for vehicle IC engine - has branch pipes of equal length to minimise time between engine start and catalytic converter activation. |
| 07/14/1993 | EP0551094A1 Fluoropolymer composite tube and method of preparation |
| 07/14/1993 | CN2138229Y Composite steel tube |
| 07/08/1993 | WO1993013344A1 Elongated housing of large cross-section and its fabrication method |
| 07/08/1993 | WO1993012894A1 Blast nozzle for high-pressure cleaning equipment |
| 07/08/1993 | CA2110902A1 Elongated housing of large cross-section and its fabrication method |
| 07/06/1993 | US5225632 Space utility conduit |
| 07/01/1993 | DE4243115A1 Flexible tube for vibration damping in exhaust system of motor vehicle - contains corrugated tube, with corrugations at different heights in different directions, enclosed in hose with metallic loops |
| 06/30/1993 | EP0548565A1 Water-crosslinkable polyolefin piping for weather-resistant crosslinked polyolefin piping |
| 06/29/1993 | US5222769 Double-wall composite pipe and coupling structure assembly |
| 06/24/1993 | WO1993012369A1 Composite metal tube and method of making the same |
| 06/23/1993 | EP0547875A2 Elastomer-lined metal pipe |
| 06/23/1993 | CN2136923Y Air delivery pipe for cold air-filling |
| 06/22/1993 | CA1319333C Supports for double-containment thermoplastic pipe assemblies |
| 06/16/1993 | EP0546138A1 Method for producing a line having variable stiffness, and related element. |
| 06/15/1993 | US5219403 Plastic self-insulating ductwork system |
| 06/15/1993 | US5219003 Multi-layered tubes having impact resistance-modified polyamide layers |
| 06/08/1993 | US5217071 Production tube with integrated hydraulic line |
| 06/08/1993 | US5217042 Residential waste water disposal system |
| 05/27/1993 | WO1993009948A1 Tube |
| 05/26/1993 | CN2134569Y Polyurethane compound direct bury insulation pipe |
| 05/26/1993 | CN2134568Y Compound material pipe-line |
| 05/26/1993 | CN1072484A Steel reinforced formed aluminium alloy |
| 05/26/1993 | CN1020873C Plastic coated steel tube and making method thereof |
| 05/19/1993 | EP0542185A1 Multilayered plastic pipe |
| 05/19/1993 | EP0542184A1 Multilayered plastic pipe |
| 05/19/1993 | DE4209510C1 Jacketed pipe with mutually fixer inner and outer pipes - consist each of two partial pipes, with outer pipe parts firmly connected |
| 05/19/1993 | CN2133737Y Steel plastic anti-decay series pipe material |
| 05/18/1993 | US5212349 Cable duct with detector wire |
| 05/18/1993 | US5211220 Polytetrafluoroethylene and fluorinated alkoxy polytetra fluoroethylene |
| 05/12/1993 | EP0540770A1 Impact protected , sealed, double-walled pipe body |
| 05/12/1993 | CN1072007A Wear- and corrosion-resistant composite steel pipe and mfg. method thereof |