Hitachi Computer Engineering Co., Ltd.
57Patents
0Active
57Granted
39Portfolio score
Filing activity: Aug 1, 1986 → Dec 18, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5548724A | File server system and file access control method of the same | Physics | 333 | Expired |
| US5671354A | Method of assisting server access by use of user authentication information held in one of servers and a method of assisting management user account for use of servers | Electricity | 229 | Expired |
| US5603003A | High speed file access control method and computer system including a plurality of storage subsystems connected on a bus | Physics | 109 | Expired |
| US5295251A | Method of accessing multiple virtual address spaces and computer system | Physics | 108 | Expired |
| US5231585A | Computer-integrated manufacturing system and method | Emerging Cross-Sectional Technologies | 107 | Expired |
| US5745444A | Method of controlling recording information on an optical disk using replacement control information | Physics | 92 | Expired |
| US5761435A | Multiprocessor bridge having storage for spanning tree operation mode information indicating whether each port of the bridge is operable under spanning tree protocol | Electricity | 82 | Expired |
| US5982762A | Wireless LAN system, base station device and wireless terminal device therefor, and method for relaying information frame | Electricity | 80 | Expired |
| US4872167A | Method for displaying program executing circumstances and an apparatus using the same | Physics | 79 | Expired |
| US5543607A | Self check-out system and POS system | Physics | 77 | Expired |
| US5210844A | System using selected logical processor identification based upon a select address for accessing corresponding partition blocks of the main memory | Physics | 73 | Expired |
| US4943912A | Parallel processor system having control processor and array control apparatus for selectively activating different processors | Physics | 61 | Expired |
| US5136709A | Method for generating an operating system by a static link-editor | Physics | 60 | Expired |
| US5191646A | Display method in software development support system | Physics | 57 | Expired |
| US6014406A | Frequency-hopped wireless communication system and mobile wireless terminal | Electricity | 55 | Expired |
| US4849882A | Vector processing system for processing plural vector instruction streams | Physics | 53 | Expired |
| US5386623A | Process for manufacturing a multi-chip module | Emerging Cross-Sectional Technologies | 53 | Expired |
| US6148415A | Backup switching control system and method | Physics | 49 | Expired |
| US5202887A | Access control method for shared duplex direct access storage device and computer system therefor | Physics | 48 | Expired |
| US4777357A | Bar code reader | Physics | 45 | Expired |
| US4802164A | Method and apparatus for testing a multi-processor system | Physics | 44 | Expired |
| US5327535A | Magnetic recording control apparatus | Physics | 42 | Expired |
| US5373254A | Method and apparatus for controlling phase of a system clock signal for switching the system clock signal | Electricity | 35 | Expired |
| US5329690A | Printed circuit board assembling system | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5073970A | Vector processing apparatus allowing succeeding vector instruction chain processing upon completion of decoding of a preceding vector instruction chain | Physics | 32 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.