HITACHI, LTD.
46,007Patents
14,106Active
46,007Granted
53Portfolio score
Filing activity: Mar 17, 1967 → Nov 5, 2024 · 6,739 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5193154A | Buffered peripheral system and method for backing up and retrieving data to and from backup memory device | Emerging Cross-Sectional Technologies | 1,308 | Expired |
| US5226157A | Backup control method and system in data processing system using identifiers for controlling block data transfer | Physics | 1,296 | Expired |
| US4480910A | Pattern forming apparatus | Physics | 1,003 | Expired |
| US6301592A | Method of and an apparatus for displaying version information and configuration information and a computer-readable recording medium on which a version and configuration information display program is recorded | Physics | 959 | Expired |
| US5027400A | Multimedia bidirectional broadcast system | Electricity | 881 | Expired |
| US5715039A | Projection exposure apparatus and method which uses multiple diffraction gratings in order to produce a solid state device with fine patterns | Physics | 856 | Expired |
| US6128003A | Hand gesture recognition system and method | Physics | 803 | Expired |
| US5134965A | Processing apparatus and method for plasma processing | Electricity | 712 | Expired |
| US4282573A | Processor interrupt device for an electronic engine control apparatus | Emerging Cross-Sectional Technologies | 688 | Expired |
| US4579623A | Method and apparatus for surface treatment by plasma | Electricity | 595 | Expired |
| US5242539A | Plasma treatment method and apparatus | Electricity | 558 | Expired |
| US5574247A | CVD reactor apparatus | Chemistry; Metallurgy | 545 | Expired |
| US4985114A | Dry etching by alternately etching and depositing | Emerging Cross-Sectional Technologies | 545 | Expired |
| US6465892B1 | Interconnect structure for stacked semiconductor device | Electricity | 533 | Expired |
| US6069648A | Information communication terminal device | Electricity | 531 | Expired |
| US4857137A | Process for surface treatment | Electricity | 497 | Expired |
| US6889211B1 | Method and system for distributing multimedia data with management information | Emerging Cross-Sectional Technologies | 482 | Expired |
| US5850254A | Imaging system for a vehicle which compares a reference image which includes a mark which is fixed to said vehicle to subsequent images | Physics | 481 | Expired |
| US4396705A | Pattern forming method and pattern forming apparatus using exposures in a liquid | Electricity | 466 | Expired |
| US5110407A | Surface fabricating device | Electricity | 456 | Expired |
| US7085904B2 | Storage system and method for backup | Emerging Cross-Sectional Technologies | 451 | Expired |
| US5617312A | Computer system that enters control information by means of video camera | Human Necessities | 449 | Expired |
| US6682971B2 | Method of manufacturing a semiconductor | Electricity | 448 | Expired |
| US4982265A | Semiconductor integrated circuit device and method of manufacturing the same | Electricity | 439 | Expired |
| US5446690A | Semiconductor nonvolatile memory device | Physics | 432 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.