Akira Ichikawa
97Patents
26h-index
128Co-inventors
91Inventor score
Filing activity: Dec 20, 1976 → Jun 12, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5544050A | Sign language learning system and method | Physics | 123 | Expired |
| US6319425A | Transparent coating member for light-emitting diodes and a fluorescent color light source | Electricity | 121 | Expired |
| US6521915B2 | Light-emitting diode device | Electricity | 107 | Expired |
| US5887069A | Sign recognition apparatus and method and sign translation system using same | Physics | 100 | Expired |
| US5113185A | Current location indication apparatus for use in an automotive vehicle | Physics | 81 | Expired |
| US4963865A | Apparatus for displaying travel path | Physics | 80 | Expired |
| US6898927B2 | Emission control system with catalyst warm-up speeding control | Emerging Cross-Sectional Technologies | 57 | Expired |
| US5854713A | Reflection type angle of view transforming optical apparatus | Physics | 50 | Expired |
| US5185848A | Noise reduction system using neural network | Physics | 50 | Expired |
| US4975957A | Character voice communication system | Physics | 50 | Expired |
| US5040215A | Speech recognition apparatus using neural network and fuzzy logic | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5384891A | Vector quantizing apparatus and speech analysis-synthesis system using the apparatus | Electricity | 45 | Expired |
| US4473904A | Speech information transmission method and system | Physics | 45 | Expired |
| US5728941A | Misfire detecting apparatus using difference in engine rotation speed variance | Physics | 39 | Expired |
| US6279390A | Thermostat malfunction detecting system for engine cooling system | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4559604A | Pattern recognition method | Physics | 36 | Expired |
| US4590605A | Method for production of speech reference templates | Physics | 32 | Expired |
| US6501495B1 | Heat activating and thermosensitive recording for thermosensitive adhesive label | Physics | 31 | Expired |
| US4283601A | Preprocessing method and device for speech recognition device | Physics | 30 | Expired |
| US5077798A | Method and system for voice coding based on vector quantization | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4088838A | Voice response system | Physics | 30 | Expired |
| US4227046A | Pre-processing system for speech recognition | Physics | 30 | Expired |
| US6500536B1 | Heat activatable adhesive composition and adhesive sheet having adhesive layer thereof | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5263364A | Apparatus for detecting misfire in multicylinder internal combustion engines | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US4776015A | Speech analysis-synthesis apparatus and method | Physics | 28 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.