Hitachi patents granted on 24 February 2009

28 US patents granted on 24 February 2009 and assigned to Hitachi

1 D587,235 Mobile telephone
2 7,496,724 Load balancing in a mirrored storage system
3 7,496,718 Data transfer and access control between disk array systems
4 7,496,432 Radio communications system for controlling a vehicle
5 7,496,429 Power plant operation control system and a power plant maintaining and managing method
6 7,496,415 Digital servo control unit and laser machining apparatus
7 7,496,383 Mobile communication system and base station control apparatus
8 7,496,280 Still picture information recording medium and method and apparatus for reproducing still picture information therefrom
9 7,496,256 Diffraction grating and dispersion compensation circuit
10 7,496,254 Curved optical waveguide and optical device
11 7,496,212 Change detecting method and apparatus
12 7,496,071 Mobile node, server, and communication system
13 7,496,025 Optical disc drive apparatus with an indirect semiconductor laser containing an asymmetric quantum well structure
14 7,495,943 Semiconductor memory device
15 7,495,856 Disk drive slider design for thermal fly-height control and burnishing-on-demand
16 7,495,719 Device capable of switching between an image display status and a mirror status, and an instrument disposed therewith
17 7,495,646 Display device having improved drive circuit and method of driving same
18 7,495,636 Surface discharge type plasma display panel divided into a plurality of sub-screens
19 7,495,628 Corner reflector antenna with ground plate
20 7,495,415 DC backup power supply system
21 7,495,411 Controller for an electric four-wheel-drive vehicle
22 7,495,207 Optical sensor, optical temperature-measuring device and measuring method using the optical sensor
23 7,495,167 Silicon solar cell and production method thereof
24 7,494,941 Manufacturing method of semiconductor device, and substrate processing apparatus
25 7,494,728 Magnetic tape and magnetic tape cartridge
26 7,494,562 Vapor phase growth apparatus
27 7,494,036 Electric driving machine
28 7,493,978 Traveling hydraulic working machine