53 US patents granted on 31 March 2009 and assigned to Hitachi
| 1 | 7,512,888 | Management method and apparatus for storage apparatus |
| 2 | 7,512,867 | Method for encoding/decoding error correcting code, transmitting apparatus and network |
| 3 | 7,512,805 | Machine readable medium and method for data storage security |
| 4 | 7,512,804 | Data storage security apparatus and system |
| 5 | 7,512,757 | Computer system and control method for the computer system |
| 6 | 7,512,755 | Computer system storing data on multiple storage systems |
| 7 | 7,512,746 | Storage system with designated CPU cores processing transactions across storage nodes |
| 8 | 7,512,688 | PPPoE network system that can distribute connection requests from PPPoE client terminals to specific PPPoE servers |
| 9 | 7,512,680 | System monitoring method |
| 10 | 7,512,643 | Computer system for managing backup of storage apparatus and backup method of the computer system |
| 11 | 7,512,637 | Storage system and undo processing method |
| 12 | 7,512,471 | Control device for working vehicle |
| 13 | 7,512,418 | Sensor node, base station, and sensor network system |
| 14 | 7,512,344 | Variable dispersion compensator |
| 15 | 7,512,341 | Passive optical network system and ranging system thereof |
| 16 | 7,512,324 | Data recording apparatus, reproduction apparatus, recording/reproduction method, and imaging apparatus |
| 17 | 7,512,321 | Video recording/playback system and method for generating video data capable of providing information for substituting an advertisement thereby |
| 18 | 7,512,259 | Defect inspection method and apparatus |
| 19 | 7,512,252 | Image processing system and vehicle control system |
| 20 | 7,512,231 | Computation method for modular exponentiation operation in decryption or signature generation |
| 21 | 7,512,165 | Photoelectric conversion module and optical transceiver using the same |
| 22 | 7,512,164 | Laser drive IC and optical transceiver using same |
| 23 | 7,512,038 | Ultrasonic transducer and manufacturing method |
| 24 | 7,511,926 | Larger dR CPP GMR structure |
| 25 | 7,511,919 | Magnetic disk apparatus |
| 26 | 7,511,913 | Stable time domain radial self-servo write propagation |
| 27 | 7,511,911 | Storage system having a power source state detection unit |
| 28 | 7,511,828 | Three-dimensional shape measuring unit, processing unit, and semiconductor device manufacturing method |
| 29 | 7,511,806 | Apparatus and method for inspecting defects |
| 30 | 7,511,679 | Antenna, and radio timepiece using the same, keyless entry system, and RFID system |
| 31 | 7,511,576 | High frequency power amplifying circuit and high frequency electronic component using the same |
| 32 | 7,511,574 | Predistorter |
| 33 | 7,511,558 | Semiconductor devices utilizing double gated fully depleted silicon on insulator MOS transistors |
| 34 | 7,511,485 | Magnetic field measurement method and system |
| 35 | 7,511,450 | Frequency converter, motor, motor drive system and maintenance method for motor drive system |
| 36 | 7,511,441 | Semiconductor integrated circuit, drive circuit, and plasma display apparatus |
| 37 | 7,511,420 | Light emitting display suppressing color variations due to viewing angle |
| 38 | 7,511,277 | Nuclear medicine diagnostic apparatus, positron emission computed tomography apparatus, and detector units |
| 39 | 7,511,272 | Method for controlling charged particle beam, and charged particle beam apparatus |
| 40 | 7,511,271 | Scanning electron microscope |
| 41 | 7,511,232 | Substrate for mounting electronic part and electronic part |
| 42 | 7,510,999 | Lubricant composition for magnetic recording media |
| 43 | 7,510,801 | Alkaline battery and method for producing the same |
| 44 | 7,510,790 | Magnetic powder, method for producing the same and magnetic recording medium comprising the same |
| 45 | 7,510,789 | Perpendicular magnetic recording media |
| 46 | 7,510,769 | Laminate film |
| 47 | 7,510,671 | Inorganic scintillator and process for its fabrication |
| 48 | 7,509,932 | Control apparatus for controlling internal combustion engines |
| 49 | 7,509,928 | Suspended steam boiler |
| 50 | 7,509,799 | Engine exhaust gas treatment system and exhaust gas treatment process |
| 51 | 7,509,747 | Laser level |
| 52 | 7,509,729 | Method for making a perpendicular magnetic recording write head |
| 53 | D589,481 | Mobile telephone |
