43 US patents granted on 31 January 2006 and assigned to Hitachi
| 1 | 6,993,765 | Controller and operating system |
| 2 | 6,993,680 | Backup power supply device for a storage device |
| 3 | 6,993,636 | Subsystem and method of organizing multiplexed data |
| 4 | 6,993,633 | Computer system utilizing speculative read requests to cache memory |
| 5 | 6,993,625 | Load balancing storage system |
| 6 | 6,993,624 | Method and apparatus for selecting enqueued data access operations for execution in a disk drive data storage device |
| 7 | 6,993,524 | Network-attached disk unit with data protection function and server protecting data stored in network-attached disk device |
| 8 | 6,993,344 | CDMA wireless base station |
| 9 | 6,993,323 | Wireless communication processing system, wireless communication processing device, and wireless communication processing method |
| 10 | 6,993,250 | Data recording device for recording data in basic recording units |
| 11 | 6,993,160 | Personal identification device and method |
| 12 | 6,993,029 | IP switch, interface circuit and ATM switch used for IP switch, and IP switch network system |
| 13 | 6,992,936 | Semiconductor, memory card, and data processing system |
| 14 | 6,992,866 | Exchange-coupled magnetoresistive sensor with a coercive ferrite layer and an oxide underlayer having a spinal lattice structure |
| 15 | 6,992,862 | Disk drive with controlled pitch static attitude of sliders on integrated lead suspensions by improved plastic deformation processing |
| 16 | 6,992,860 | Recording/reproducing separated magnetic head with concave portion formed in air bearing protective film |
| 17 | 6,992,853 | Method and apparatus for determining modulated, amplitude ramping RRO harmonics in multi-screw clamped HDD disk/spind assembly |
| 18 | 6,992,850 | Magnetic disk drive reducing influence of rigidity of transmission lines on suspension |
| 19 | 6,992,744 | TFT active matrix liquid crystal display devices |
| 20 | 6,992,738 | Liquid crystal display device including an electrode constituting pixel electrode connected to another electrode through opening formed in color filter |
| 21 | 6,992,736 | Liquid crystal display device |
| 22 | 6,992,734 | Liquid crystal display device |
| 23 | 6,992,676 | Image display system |
| 24 | 6,992,646 | Plasma display panel |
| 25 | 6,992,634 | Antenna device commonly used for two frequencies |
| 26 | 6,992,553 | Magnetic-field molding apparatus |
| 27 | 6,992,464 | Battery charger capable of indicating time remaining to achieve full charge |
| 28 | 6,992,450 | Active mass damper |
| 29 | 6,992,425 | Display apparatus with a multi-layer absorption, conduction and protection film |
| 30 | 6,992,343 | Semiconductor memory device |
| 31 | 6,992,312 | Medical charged particle irradiation apparatus |
| 32 | 6,992,307 | Electron beam source and electron beam exposure apparatus employing the electron beam source |
| 33 | 6,992,286 | Material characterization system |
| 34 | 6,991,950 | Method for fabricating semiconductor laser element and the same laser element |
| 35 | 6,991,932 | Carbon nanotube connected instrument |
| 36 | 6,991,521 | Edge finishing process for glass or ceramic disks used in disk drive data storage devices |
| 37 | 6,991,443 | Oil injected screw compressor |
| 38 | 6,991,335 | Liquid crystal projector |
| 39 | 6,991,324 | Solution injector head, functional layer forming apparatus and liquid crystal display |
| 40 | 6,991,188 | Engine fuel injection valve and manufacturing method for nozzle plate used for the same injection valve |
| 41 | 6,991,052 | Hybrid car |
| 42 | 6,990,966 | Heater unit for a combustion-stabilizing device and a combustion stabilizing device including the same |
| 43 | 6,990,815 | Gas turbine and gas turbine high temperature section cooling method |
