WATERWORKS TECHNOLOGY DEVELOPMENT ORGANIZATION CO., LTD.

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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 GENERAL1852
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING469
 
  
 
E03B INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER 112
 
  
 
0808 FASTENING, SUPPORTING OR MOUNTING DEVICES NOT INCLUDED IN OTHER CLASSES119

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9890883 Pipe joint, packing ring, and method for mounting pipe jointSep 03, 10Feb 13, 18[F16L]
9638347 Device for blocking a flow passage using an inflatable bagMar 11, 15May 02, 17[F16K, F16L]
9004090 Sluice valve for operationsAug 06, 10Apr 14, 15[F16K, F16L, E03B]
8444187 Separation prevention device for pipe jointJun 27, 12May 21, 13[F16L]
8308202 Separation prevention device for pipe jointApr 02, 08Nov 13, 12[F16L]
8186648 Method of shutting off conduit and pipe conduit shutoff apparatusAug 25, 08May 29, 12[F16L]
7717136 Pipeline closing apparatusOct 26, 04May 18, 10[F16L]
7354073 Pipe jointMar 29, 05Apr 08, 08[F16L]
7328874 Supporting device for non-averaged forceMay 03, 06Feb 12, 08[F16L]
7073776 Sluicing valve deviceNov 02, 04Jul 11, 06[F16K]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6773040 Spacer-less type pipe joint and packing ring used for the sameExpiredJul 30, 02Aug 10, 04[F16L]
2002/0189,692 Joint fluid transport pipeAbandonedJun 13, 01Dec 19, 02[F16K]
2002/0117,587 Supporting device for non-averaged forceAbandonedFeb 19, 02Aug 29, 02[F16L]
6371530 Tube jointExpiredOct 20, 00Apr 16, 02[F16L]
6305426 Expansion tube joint and assembling method thereofExpiredSep 09, 99Oct 23, 01[F16L]
6203073 Tube jointExpiredSep 09, 99Mar 20, 01[F16L]
6131957 Fixing construction for pipe jointExpiredMar 17, 99Oct 17, 00[F16L]
6056329 Telescopic pivotal pipe jointExpiredApr 01, 98May 02, 00[S16L]
5967168 Method of connecting branch pipeExpiredApr 03, 98Oct 19, 99[F16K, F16L]
5924436 Connecting construction of branch pipe and connecting method thereofExpiredApr 06, 98Jul 20, 99[F16K, F16L]

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