Kabushiki Kaisha Hitachi Seisakusho

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16D COUPLINGS FOR TRANSMITTING ROTATION 883
 
  
 
B60T VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL 568
 
  
 
F16F SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION554
 
  
 
F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR 441
 
  
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 254
 
  
 
B05B SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES 163
 
  
 
F01B MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES 126
 
  
 
F01C ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES 128
 
  
 
F03C POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS 123
 
  
 
F26B DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM 129

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8141227 Assembly of sheet materials, tube assembly, drawing method and tools for drawingSep 05, 08Mar 27, 12[B23P, B21D]
7530252 Method and apparatus for working tubeJul 17, 03May 12, 09[B21D]
7503437 Radially mounted disk brakeSep 07, 04Mar 17, 09[F16D]
7455153 Disc brakeFeb 13, 04Nov 25, 08[F16D]
RE40573 Master cylinderMar 02, 06Nov 18, 08[B60T]
7299905 Electric disc brake apparatusFeb 13, 04Nov 27, 07[F16D]
7252031 Cylinder apparatusAug 11, 03Aug 07, 07[F01B]
7219781 Electromagnetic suspension systemFeb 25, 04May 22, 07[F16F]
7201568 Scroll fluid machineNov 26, 03Apr 10, 07[F03C]
7040468 Hydraulic shock absorberAug 25, 03May 09, 06[F16F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7591636 Negative pressure supply apparatusExpiredAug 25, 04Sep 22, 09[F04B, F04F]
7287759 Stabilizer deviceExpiredAug 25, 04Oct 30, 07[B60G]
7003954 Master cylinder apparatusExpiredAug 25, 04Feb 28, 06[B60T]
6976645 Ejector for use with pneumatic boosterExpiredJul 30, 03Dec 20, 05[B05B]
2005/0145,448 Electric braking apparatusAbandonedMar 01, 05Jul 07, 05[F16D]
2005/0067,891 Master cylinder apparatusAbandonedAug 25, 04Mar 31, 05[B60T]
6862882 Pneumatic boosterExpiredAug 15, 03Mar 08, 05[F16D]
6796772 Ejector and negative-pressure supply apparatus using the sameExpiredJul 03, 02Sep 28, 04[F04F]
2004/0168,297 Assembly of sheet materials, tube assembly, drawing method and tools for drawingAbandonedNov 26, 03Sep 02, 04[B23P, F16B]
5837332 Method and apparatus for preparing crystal thin films by using a surface acoustic waveExpiredJul 31, 96Nov 17, 98[B06B, H03H]
5650043 Etching method using NH.sub.4 F solution to make surface of silicon smooth in atomic orderExpiredMay 25, 95Jul 22, 97[C25F]
5067904 IC socketExpiredOct 03, 90Nov 26, 91[H05K]

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