WITZENMANN GMBH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL1357
 
  
 
F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES 568
 
  
 
B01D SEPARATION 2132
 
  
 
B23K SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 291
 
  
 
B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL120
 
  
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 155

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9789432 Flexible line segment for the exhaust system of an internal combustion engineJul 31, 13Oct 17, 17[F16L, F01N, B01D]
9638358 Duct element for the exhaust system of a motor vehicleFeb 06, 14May 02, 17[F16L, F01N]
9638359 Strip wound hoseFeb 01, 16May 02, 17[B26D, F16L, F01N]
9175793 Attachment connection, and method of connecting a thin-walled hose line to a carbon-containing attachment partOct 15, 08Nov 03, 15[F16L, F01N]
9039800 Filter for a fluid-conducting pipeJul 31, 13May 26, 15[B01D]
8793850 Method for producing a tube with a bent progression as a transverse progressionNov 14, 11Aug 05, 14[B21J, B21D]
8291943 Exhaust-gas conduction componentOct 11, 08Oct 23, 12[F16L]
5842723 Flexible connection arrangement for connecting a pipe of an exhaust system to an engine, especially in a motor vehicleNov 25, 96Dec 01, 98[F16L]
5437479 Flexible connection arrangement for the two pipe portions particularly for motor vehicle exhaustsMay 27, 94Aug 01, 95[F16L]
5358287 Jointed pipe connectionJun 30, 93Oct 25, 94[F16L]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2015/0084,328 COMPENSATOR ARRANGEMENTAbandonedSep 24, 14Mar 26, 15[F16L]
2015/0053,387 LINE WITH ARCHED STRUCTUREAbandonedAug 26, 14Feb 26, 15[F16L, F28F]
8668172 Holding device for a sprinkler nozzleExpiredSep 14, 09Mar 11, 14[F16L]
8505286 Decoupling elementExpiredOct 01, 09Aug 13, 13[F01N]
7954771 Sprinkler mountExpiredJun 15, 07Jun 07, 11[F16L, G09F, A62C]
2008/0134,744 METHOD AND PREPROCESSED TUBE FOR PRODUCING A TUBE WITH A BENT PROGRESSION OR A BEND EMBODIED AS A TRAVERSE PROGRESSIONAbandonedDec 11, 07Jun 12, 08[B21D]
2008/0012,297 Flexible pipe elementAbandonedFeb 19, 04Jan 17, 08[F16L]
7290804 Plug connection between a corrugated hose and an unprofiled pipeExpiredMar 13, 03Nov 06, 07[F16L]
6789615 Heat exchanger, in particular for swimming poolsExpiredFeb 28, 03Sep 14, 04[F28D]
2002/0079,702 Flexible conduit element with a connection device attached to at least one endAbandonedJan 18, 01Jun 27, 02[F16L]
2002/0074,111 Heat exchanger, in particular for swimming poolsAbandonedOct 16, 01Jun 20, 02[A61H, F28D]
6401508 Components of a hydroforming machineExpiredMar 26, 01Jun 11, 02[B21D]
2002/0043,806 Connection for corrugated piping sections of metalAbandonedAug 02, 01Apr 18, 02[F16L]
6155303 Hose with interlocked profile, particularly for automotive exhaust systemsExpiredMay 14, 99Dec 05, 00[F16L]
6125889 Flexible conveying elementExpiredMay 10, 99Oct 03, 00[F16L]
4911206 Supported flexible thin-walled tube structureExpiredJun 24, 88Mar 27, 90[F16L]
4875716 Jointed pipe connection, particularly for automotive exhaust pipesExpiredFeb 10, 87Oct 24, 89[F16C]
4856494 Solar heating installation with failure-protected heating medium hoseExpiredDec 11, 87Aug 15, 89[F24J]
4791963 Flexible tube with mutually parallel, ring-shaped flutes and axial supportExpiredJul 15, 86Dec 20, 88[F16L]

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