Hitachi Building Systems Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16N LUBRICATING115
 
  
 
F25B REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS 167
 
  
 
G01K MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR 145
 
  
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 1101

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6795324 Power converterMar 19, 02Sep 21, 04[H02M]
6701727 Apparatus and method for managing heat source unit for air conditionerOct 10, 02Mar 09, 04[G01K, F25B]
6098756 Guide rail lubricating device for elevator, and case and oil-retaining member for the lubricating deviceMar 16, 99Aug 08, 00[F16N]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2011/0161,131 Energy Saving Assistance System and Energy Saving Assistance ProgramAbandonedDec 23, 10Jun 30, 11[G06Q]
7194415 Support system for maintenance contract of elevatorExpiredMar 09, 01Mar 20, 07[G06Q]
6742634 Magnetic brake system and elevator trouble detection systemExpiredDec 10, 02Jun 01, 04[B60T]
2004/0026,177 ElevatorAbandonedFeb 06, 03Feb 12, 04[B66B]
2003/0057,029 Managing method and system for building equipment and elevatorAbandonedSep 24, 02Mar 27, 03[B66B]
6490187 Semiconductor electric power conversion deviceExpiredSep 06, 01Dec 03, 02[H02M]
6390270 EscalatorExpiredFeb 25, 00May 21, 02[B66B]
6263696 Air-cooled absorption type chiller heater and modification methodExpiredFeb 02, 00Jul 24, 01[F25B]
6247574 Escalator installation methodExpiredMar 14, 00Jun 19, 01[B66B]
6234295 Passenger conveyor systemExpiredDec 15, 99May 22, 01[B65B]

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