TOKYO METROPOLITAN SEWERAGE SERVICE CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E03F SEWERS; CESSPOOLS210
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING271
 
  
 
B01D SEPARATION 1133
 
  
 
B05B SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES 163
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 154
 
  
 
E21D SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS 115

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2014/0227,954 BLOWER AND VENTILATION SYSTEMApr 14, 14Aug 14, 14[B05B, E03F]
2013/0240,421 VORTEX FLOW TYPE WATER SURFACE CONTROL DEVICE FOR DRAINING DEVICEDec 09, 11Sep 19, 13[E03F]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9850649 Vortex flow type water surface control device for draining deviceDec 09, 11Dec 26, 17[E03F]
9302923 Wastewater treatment apparatus, wastewater treatment method, wastewater treatment system, control device, and control methodSep 09, 14Apr 05, 16[C02F]
8979432 Vortex flow type water surface control device for draining deviceAug 02, 04Mar 17, 15[E03F, B01D]
8695628 Opening/closing deviceFeb 02, 10Apr 15, 14[F16K]
8590560 Opening/closing deviceFeb 02, 10Nov 26, 13[F16K, E02B]
7073869 Shield tunneling machineSep 16, 04Jul 11, 06[E21D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5382356 Method and apparatus for controlling sludge dewateringExpiredJun 10, 92Jan 17, 95[C02F, B01D]
4822211 Method and apparatus for laying cable in a pipeExpiredJun 24, 87Apr 18, 89[F16L]

Top Inventors for This Owner

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