| Patents for E03F 9 - Arrangements or fixed installations for cleaning sewer pipes, e.g. by flushing (1,182) |
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| 04/04/1990 | EP0361055A1 Device for diverting high-pressure hoses |
| 03/27/1990 | US4911832 Automatic drain system treatment apparatus |
| 02/22/1990 | WO1990001380A1 Improved drain-cleaning implement |
| 02/13/1990 | US4899770 Apparatus for preventing deterioration of concrete pipe |
| 01/30/1990 | US4896686 Pivoting hose storage reel and mounting thereof |
| 01/23/1990 | US4895178 Device for cleaning a drain |
| 01/03/1990 | EP0348799A1 Guiding device for pipe cleaning coils |
| 12/19/1989 | US4887929 Cable coupler |
| 11/07/1989 | US4878517 High pressure hose pulsation attachment |
| 10/25/1989 | EP0338878A1 Cleaning method for pipings and for containers in water with the help of a self-driven floatable tool |
| 10/19/1989 | WO1989009661A1 Foundation drain cleaning apparatus and method |
| 10/18/1989 | CN2046139U Sewer dredging apparatus |
| 10/04/1989 | EP0334917A1 Process for repairing pipes |
| 09/27/1989 | EP0333859A1 Device for cleaning pipelines |
| 09/14/1989 | DE3806542A1 Einrichtung fuer werbezwecke Means for promotional purposes |
| 09/08/1989 | WO1989008303A1 Advertising device |
| 07/18/1989 | US4848380 Using pressurized fluid |
| 07/13/1989 | DE3743703A1 Process and system for cleaning the sewer pipe of a siphon construction |
| 06/20/1989 | US4839936 Automated sewer cleaning rodding machine |
| 06/13/1989 | US4837887 Power cleaning apparatus |
| 06/13/1989 | CA1255461A1 Pipe cleaning machine |
| 04/20/1989 | WO1989003459A1 Process for repairing pipes |
| 04/19/1989 | CN2036197U Sewage blocking cleanear |
| 04/12/1989 | CN2035775U Dredging maintaining device for indoor drain pipe |
| 04/11/1989 | US4819314 Jet nozzles |
| 04/11/1989 | US4819292 Transmission device for plumbing snakes |
| 04/06/1989 | WO1989002790A1 Device for cleaning pipelines |
| 03/22/1989 | CN2034481U Foul remover for sewer |
| 03/09/1989 | WO1989002050A1 Root-repelling pipe joints |
| 01/17/1989 | CA1248713A1 Self cleaning drain gutter or pipe |
| 01/10/1989 | US4797208 To prevent or minimize clogging problems especially in grease |
| 01/03/1989 | US4795495 Sewer cleaning device |
| 12/29/1988 | WO1988010393A1 Apparatus for working in pipes |
| 12/27/1988 | US4793017 Vibrating drain-cleaning implement |
| 12/14/1988 | EP0294780A1 Chemical control of root growth in sewers and the like |
| 12/06/1988 | US4789268 Device and method for removing irregularities in or enlarging an underground duct |
| 10/19/1988 | EP0287405A1 Method and device to unplug a tubing filled with liquid from a distance |
| 09/27/1988 | US4773115 Sewer cleaning device |
| 09/27/1988 | US4773113 Multiple use cleaning apparatus |
| 09/07/1988 | WO1988006496A1 Clearing piping filled with liquid |
| 09/01/1988 | DE3705702C1 Apparatus for cleaning sewers |
| 08/31/1988 | CN88210788U Mud cleaner for domestic sink sewer pipe |
| 08/30/1988 | US4766631 Sewer pipeline hydraulic root cutter apparatus |
| 08/16/1988 | US4764180 Method of manufacturing jet nozzles |
| 08/16/1988 | US4763376 For cleaning the interior of conduits |
| 08/16/1988 | US4763374 Powered drain cleaner |
| 08/02/1988 | CA1239761A1 Pipe cleaning device |
| 07/13/1988 | EP0181911B1 Movable hydrodynamic nozzle for pressurized water cleaning of water, discharge and surface water pipes |
| 07/12/1988 | US4756324 Hydrodynamic nozzle for pressurized water cleaning of water, discharge and surface water pipes |
| 06/29/1988 | CN86108508A Improved pipe cleaning machine |
| 06/14/1988 | CA1237855A1 Impact device |
| 06/01/1988 | DE3642995A1 Process and apparatus for preventing or eliminating sedimentation in pipelines |
| 05/18/1988 | CN87204540U Eliminating device for sewer pipe stoppage |
| 04/05/1988 | US4734951 Automated sewer cleaning rodding machine |
| 02/04/1988 | DE3625333A1 Process and apparatus for the release, dispersal and separation of solid deposits |
| 02/03/1988 | CN87206125U Dredging bar used for sewer pipe |
| 01/05/1988 | US4716613 Pipe cleaning machine |
| 12/26/1987 | CN87202588U Pipeline dredging device |
| 12/03/1987 | DE3631355C1 Method (device) for cleaning pipelines, channels and sections thereof |
| 11/17/1987 | US4706321 Drain-cleaning implement |
| 10/20/1987 | US4700422 Multiple use drain cleaning apparatus |
| 09/09/1987 | CN85109570A Sludge scraper for large diameter drainage pipe |
| 08/26/1987 | CN86104352A Reclaimer for sludge of sewer |
| 08/20/1987 | DE3604856A1 Inspection and flushing means on a sewage line |
| 07/28/1987 | CA1224694A1 Flushing, toilet tank-fed, primer valve for sewer line drain traps |
| 07/07/1987 | US4677997 High pressure revolving sewer cleaning nozzle |
| 06/10/1987 | CN85205746U Underground conduit cleaning vehicle |
| 05/19/1987 | US4666530 Method and apparatus for extracting dirt from ducting |
| 04/29/1987 | EP0219749A1 A nozzle for cleaning and rinsing drain conduits or the like |
| 04/28/1987 | US4661848 Method and apparatus for cleaning of pipes |
| 04/14/1987 | US4657436 Device and method for removing irregularities in or enlarging an underground duct |
| 04/09/1987 | DE3600100C1 Pipe cleaning device for removing coarse soiling |
| 03/19/1987 | DE3532319A1 Pipe cleaning device |
| 02/24/1987 | US4644603 Plumber's snake |
| 01/06/1987 | US4634312 Self cleaning drain gutter or pipe |
| 11/18/1986 | CA1214005A1 Drum type sewer cleaner |
| 11/05/1986 | CN85103675A Penetrating wire apparatus for pipe |
| 10/21/1986 | US4617693 Drain pipe cleaning tool |
| 10/14/1986 | CA1212662A1 Device and method for removing irregularities in or enlarging an underground duct |
| 09/16/1986 | US4611360 Pipe cleaning machine |
| 08/20/1986 | CN85104869A Pipe cleaning machine |
| 07/29/1986 | US4602495 Device and method for removing irregularities in or enlarging an underground duct |
| 05/28/1986 | EP0181911A1 Movable hydrodynamic nozzle for pressurized water cleaning of water, discharge and surface water pipes. |
| 05/10/1986 | CN85101273A Apparatus for collecting sewage in sewer pipe |
| 03/18/1986 | US4576337 Arrangement for operating dual fluid systems |
| 03/11/1986 | US4574399 Flushing, toilet tank-fed, primer valve for sewer line drain traps |
| 12/05/1985 | WO1985005295A1 Movable hydrodynamic nozzle for pressurized water cleaning of water, discharge and surface water pipes |
| 12/03/1985 | US4556434 Bubble generator, surfactant, foaming agent, solubilizer, stabilizer, drainage inhibitor, chelating agent |
| 09/24/1985 | US4542543 For use in clearing stoppages in waste lines |
| 05/14/1985 | US4516286 Sewer pipeline cleaning apparatus |
| 04/23/1985 | CA1185757A1 Automatic sewer cleaning system |
| 02/05/1985 | US4498055 Circuit arrangements for modifying dynamic range |
| 01/22/1985 | CA1181315A1 Drainage seal for sewage system |
| 01/16/1985 | EP0131276A2 Guiding and turning device for a high-pressure water tube to be sunk into a sewer |
| 01/08/1985 | CA1180514A1 Spring feeding mechanism |
| 12/11/1984 | US4487052 Device and method for removing irregularities in or enlarging an underground duct |
| 11/21/1984 | EP0125643A2 Discharge conduit, especially a gutter or down pipe |
| 11/20/1984 | CA1178004A1 Grip handle chuck |
| 10/16/1984 | US4476603 Drainage seal for sewage system |
| 09/18/1984 | CA1174435A1 Cable connector |