Hitachi Keiyo Engineering Co., Ltd.
46Patents
0Active
46Granted
38Portfolio score
Filing activity: Sep 8, 1983 → Feb 28, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5530673A | Flash memory control method and information processing system therewith | Physics | 244 | Expired |
| US6275436A | Flash memory control method and apparatus processing system therewith | Physics | 131 | Expired |
| US5195179A | Coordinate input apparatus | Physics | 125 | Expired |
| US6421279B1 | Flash memory control method and apparatus processing system therewith | Physics | 95 | Expired |
| US6194856A | Motor driving apparatus including a modularized current control circuit and method of controlling the same | Emerging Cross-Sectional Technologies | 86 | Expired |
| US6078520A | Flash memory control method and information processing system therewith | Physics | 81 | Expired |
| US5255347A | Neural network with learning function | Physics | 75 | Expired |
| US4954762A | Method and apparatus for controlling tracking path of working point of industrial robot | Emerging Cross-Sectional Technologies | 64 | Expired |
| US5034991A | Character recognition method and system | Physics | 61 | Expired |
| USD294029S | Portable computer | General | 61 | Expired |
| US4887222A | Method for controlling operation of industrial robot | Physics | 60 | Expired |
| US5557774A | Method for making test environmental programs | Physics | 58 | Expired |
| US5262954A | Automated manufacture line | Emerging Cross-Sectional Technologies | 57 | Expired |
| US5862083A | Information processing system | Physics | 52 | Expired |
| US5973964A | Flash memory control method and information processing system therewith | Physics | 51 | Expired |
| US5144555A | Method and apparatus for supporting of making formatted document | Physics | 35 | Expired |
| USD429401S | Kiosk | General | 31 | Expired |
| US5157315A | Method of controlling robot movements | Physics | 24 | Expired |
| US5481664A | Method of controlling information in multimedia system | Physics | 21 | Expired |
| US6169670A | Inverter apparatus operatable over extended frequency range while suppressing output error | Electricity | 20 | Expired |
| US4681452A | Control system for automatic electronic-part mounter | Physics | 17 | Expired |
| US5949663A | Inverter apparatus capable of readily modification of the specification and performance thereof | Electricity | 14 | Expired |
| US5170034A | Method and apparatus for welding robot control | Physics | 13 | Expired |
| US6486548B1 | Semiconductor module and power converting apparatus using the module | Electricity | 13 | Expired |
| US4883938A | Method and apparatus for automatically performing work on an object along a desired path | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.