| Patents for E03F 7 - Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools (2,571) |
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| 02/09/2000 | CN2362914Y Theft-proof valve |
| 02/03/2000 | DE19835383C1 Switching duct for fluid feed |
| 02/03/2000 | DE19833885A1 Verfahren zur Sanierung bzw. Renovierung von Abwasserleitungen und -kanälen A method for restoration or renovation of drains and sewers |
| 02/02/2000 | CN2361692Y High-pressure pneumatic pipeline cleaning and dredging machine |
| 02/02/2000 | CN2361691Y Flushing and suction dredger |
| 02/02/2000 | CN2361690Y Deodorant stoppage-preventing box for floor drain in street |
| 02/01/2000 | US6018914 Liner for manhole and a method for lining a manhole |
| 01/26/2000 | CN2360471Y Drainage stink-proof device of ground sewer |
| 01/19/2000 | CN2359356Y Anti-plugging easy dredge sewer |
| 01/11/2000 | US6013138 Method for cleaning a pipe with a vehicle |
| 01/11/2000 | US6012477 Circulating drainage system for sewage pipe installation work |
| 12/29/1999 | CN2356090Y Anti-overflow device for a group of down water discharging pipeline |
| 12/29/1999 | CN2356089Y Easy loading and unloading anti-theft manhole cover for sewage well and inspection shaft |
| 12/22/1999 | CN2355016Y Mono-directional drainage |
| 12/16/1999 | DE19826124A1 Buried cistern for rain water |
| 12/07/1999 | US5996621 Circulating drainage system for sewage pipe installation work |
| 12/07/1999 | US5996159 Waste line inspection and clean out device with water jet head |
| 11/24/1999 | EP0959187A1 Device for receiving and treating sludge |
| 11/23/1999 | CA2078086C Pneumatic sealing device for waste disposal systems |
| 11/16/1999 | US5983413 High performance flush toilet |
| 11/09/1999 | US5979497 Check valve |
| 11/03/1999 | EP0953827A1 Open channel flowmeter utilizing surface velocity and lookdown level devices |
| 10/28/1999 | DE19814944A1 Mobile station |
| 10/27/1999 | CN2345604Y Anti-block material collecting valve for sewer |
| 10/20/1999 | CN2344462Y Clear water pipeline maintenance special-purpose vehicle |
| 10/19/1999 | US5967759 Basement flash flood control system |
| 10/02/1999 | CA2267028A1 Pipe cleaning vehicle |
| 09/30/1999 | DE19820783A1 System for identifying hollow volume, e.g. pipe or waster water line |
| 09/23/1999 | DE19823328C1 Sewage system with separating line designed respectively between adjacent sewage pipes in which prim. seal is arranged |
| 09/22/1999 | EP0847549B1 Autonomous mobile robot system for sensor-based and map-based navigation in pipe networks |
| 09/07/1999 | US5946767 Pipe cleaning vehicle |
| 08/18/1999 | EP0786059B1 Stop slide valve with a housing and a joint pipe |
| 08/12/1999 | DE19806316A1 Flow velocity sensor for sewage channel |
| 07/21/1999 | EP0675987B1 Suction device |
| 07/13/1999 | US5922197 Debris suppression device |
| 07/06/1999 | US5918325 Flush toilet bowl |
| 06/30/1999 | EP0926301A2 Non-return valve |
| 06/30/1999 | EP0925411A1 A device for preventing rats and the like animals from penetrating through a draining outlet |
| 06/30/1999 | EP0925410A1 Underground pipe repair |
| 06/30/1999 | CN2326649Y Opening-type manhole cover |
| 06/24/1999 | WO1999022123A8 A device for use in the inspection of conduits, in particular sewer conduits |
| 06/23/1999 | CN2325437Y Unit control device for preventing sewer stoppage |
| 06/03/1999 | WO1999027205A1 A mobile unit and method for purifying sludge and waste water |
| 05/14/1999 | WO1999023320A1 Draining system |
| 05/06/1999 | WO1999022123A1 A device for use in the inspection of conduits, in particular sewer conduits |
| 04/28/1999 | EP0911452A2 Driving device, branch pipe inspecting/cleaning method, and branch pipe inspecting/cleaning device |
| 03/31/1999 | EP0904509A1 Method and device for controlling liquid fluxes in pipe lines |
| 03/17/1999 | CN2310806Y One-way mouse-restraining steel pin ring for sewer pipe |
| 03/09/1999 | US5878784 Pipe blocking technique |
| 03/04/1999 | DE19733449A1 Disposal appliance for light oils, etc. from oil separators, etc. |
| 03/04/1999 | CA2246127A1 A waste material processing apparatus and method |
| 03/02/1999 | US5875813 Automatic back water valve system |
| 03/02/1999 | CA2084700C Method for washing an article and collecting the used wash water, and wash pad and mobile apparatus useful therewith |
| 02/17/1999 | CN1042161C Reciprocating traction device with chain and sprocket structure |
| 02/16/1999 | US5871027 Vacuum valve controller |
| 02/11/1999 | DE19834902A1 Sewage treatment plant |
| 02/11/1999 | DE19757743C1 Back flow preventer for drain water pipe |
| 02/10/1999 | CN1207435A Drain capable of restraining cockroach |
| 02/02/1999 | USRE36069 Portable wastewater flow meter |
| 01/28/1999 | WO1999003606A1 Waste line inspection and clean out device with water jet head |
| 01/26/1999 | US5862561 Waste line inspection and clean out device with water jet head |
| 01/20/1999 | EP0891457A1 Method and apparatus for reducing saline infiltration in coastal sewerage systems |
| 12/16/1998 | EP0821753A4 Sump-vented controller mechanism for vacuum sewerage transport system |
| 12/03/1998 | DE19722238A1 Water circuit flow arrangement |
| 11/25/1998 | EP0879131A2 An extrusion apparatus and method, a tubular product, and a pipe |
| 11/25/1998 | CA2248505A1 Anti discharge system |
| 11/24/1998 | US5841527 Laser reference level setting device |
| 11/12/1998 | DE19719753A1 Sealing bracket for cap closing the end of a drain pipe |
| 11/04/1998 | CN2296372Y Movable filter separator plate for vacuum mud sucking truck |
| 10/29/1998 | DE19717097A1 Method of marking sewage pipes during production |
| 10/27/1998 | US5826609 Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber |
| 10/22/1998 | DE19716050A1 Vehicle with pipe cleaning devices |
| 10/21/1998 | EP0872680A2 Apparatus for the inspection and servicing of pipes |
| 10/08/1998 | WO1998044290A1 Method and device for controlling liquid fluxes in pipe lines |
| 10/08/1998 | CA2254090A1 Method and device for controlling liquid fluxes in pipe lines |
| 10/01/1998 | WO1998043008A1 Automatic back water valve system |
| 09/29/1998 | US5813061 Air pressure driven vacuum sewer system |
| 09/22/1998 | US5812962 Method and apparatus for organizing storing and retrieving information to administer a sewer system |
| 09/22/1998 | US5811688 Open channel flowmeter utilizing surface velocity and lookdown level devices |
| 09/16/1998 | EP0864018A1 Method of influencing a flow of waste water |
| 09/02/1998 | CN2289838Y Stronge hand implement for emptying sewer |
| 09/02/1998 | CN1192177A An extrusion apparatus and method, a tubular product, and a pipe |
| 09/01/1998 | US5799729 Device for working the insides of pipes, conduits or the like |
| 08/27/1998 | DE19706724A1 Barrier for preventing entry of rats etc. into residence via sewerage system |
| 08/19/1998 | EP0859094A1 Manhole shaft system and introducing guide |
| 08/19/1998 | EP0858587A1 Sewer construction |
| 08/13/1998 | DE19708001A1 Movable device for inspecting or cleaning pipes, conduits and channels |
| 08/13/1998 | DE19705248A1 Stop slide valve to shut-off/regulate flowing mediums in settling tanks |
| 08/04/1998 | US5790476 Methods and systems for locating an underground sewer using a buoy |
| 07/15/1998 | EP0853211A1 Robot and robot arm for the repair of ducts |
| 07/15/1998 | EP0853208A1 Multilayer pipe |
| 07/15/1998 | EP0853165A1 Circulating drainage system for sewage pipe installation work |
| 07/15/1998 | EP0853164A1 Circulating drainage system for sewage pipe installation work |
| 07/09/1998 | WO1998029676A1 Testing of plumbing installations and plumbing tool |
| 07/07/1998 | US5775365 Flood protection sewer backflow control valve and adapter assembly |
| 07/02/1998 | DE19715816C1 Sludge collector or processor |
| 07/01/1998 | CN1186191A 真空阀控制器 A vacuum valve controller |
| 06/23/1998 | US5769125 Inversion-resistant, readily openable tide gate valve |
| 06/17/1998 | EP0847549A1 Autonomous mobile robot system for sensor-based and map-based navigation in pipe networks |
| 06/09/1998 | US5762450 System and method for relining sewer pipe sections with inspection capability |