FIJITSU LIMITED
25Patents
5Active
25Granted
37Portfolio score
Filing activity: Feb 11, 1980 → Jul 29, 2019 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6392567B1 | Apparatus for repeatedly compressing a data string and a method thereof | Emerging Cross-Sectional Technologies | 67 | Expired |
| US5440631A | Information distribution system wherein storage medium storing ciphered information is distributed | Physics | 43 | Expired |
| US6046896A | DC-to-DC converter capable of preventing overvoltage | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4348802A | Process for producing a semiconductor device | Electricity | 15 | Expired |
| US4329660A | Semiconductor light emitting device | Electricity | 14 | Expired |
| US5321804A | Chemical data handling system | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4343080A | Method of producing a semiconductor device | Electricity | 10 | Expired |
| US7081792B2 | Operational amplifier, line driver, and liquid crystal display device | Physics | 10 | Expired |
| US5589425A | Process of selective area chemical vapor deposition of metal films | Electricity | 9 | Expired |
| US6536673B1 | Circuit for detecting presence or absence of proximity IC card device | Physics | 7 | Expired |
| US6887396B2 | Micromirror unit and method of making the same | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7137035B2 | Load testing apparatus, computer readable recording medium for recording load test program, fault diagnosis apparatus, and computer readable recording medium for recording fault diagnosis program | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6198264A | Maximum duty ratio setting circuit for a DC-DC converter | Electricity | 5 | Expired |
| US7443574B2 | Optical transmission system | Electricity | 5 | Active |
| US6332578A | Adapter | Physics | 4 | Expired |
| US4476426A | One-terminal type level control circuit | Electricity | 4 | Expired |
| US6292870A | Information processing system in which memory devices and copies of tags are accessed in response to access requests issued from plurality of processing units | Physics | 4 | Expired |
| US6597909B1 | Apparatus and a method for performing a call control in a mobile communication system | Electricity | 4 | Expired |
| US6888301B1 | Gas-discharge display apparatus having optical filter selectively absorbing light of a wavelength equal to that of the light emission of the discharge gas | Electricity | 3 | Expired |
| US9036593B2 | Communications apparatus and communications system using multicarrier transmission mode | Electricity | 2 | Active |
| US6159666A | Environmentally friendly removal of photoresists used in wet etchable polyimide processes | Physics | 2 | Expired |
| US6311124A | Device, method and system for selecting emergency vehicles | Physics | 2 | Expired |
| US8996694B2 | Computer-readable recording medium, information processing method, and information processing apparatus | Electricity | 1 | Active |
| US11568204B2 | Optimization apparatus and control method thereof | Physics | 0 | Active |
| US8412958B2 | Target device, method and system for managing device, and external device | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.