Keiji Ishizuka
13Patents
7h-index
14Co-inventors
59Inventor score
Filing activity: Jul 25, 1986 → Feb 14, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5200639A | Semiconductor device with isolating groove containing single crystalline aluminum wiring | Electricity | 29 | Expired |
| US5514989A | Semiconductor light emitting element driver circuit | Electricity | 19 | Expired |
| US5848194A | Coding/decoding apparatus and coding/decoding method | Electricity | 18 | Expired |
| US5262873A | Image signal correcting in image data processing requiring only small memory capacity | Electricity | 14 | Expired |
| US6313767A | Decoding apparatus and method | Electricity | 14 | Expired |
| US5655032A | Coding method and apparatus therefor | Electricity | 13 | Expired |
| US5410247A | Circuit device having a test function for checking circuit operation | Physics | 11 | Expired |
| US5784497A | Arithmetic encoding with carry over processing | Electricity | 7 | Expired |
| US6026197A | Coding method and apparatus therefor | Electricity | 7 | Expired |
| US5364802A | Method of making a semiconductor device with buried electrode | Electricity | 7 | Expired |
| US4714892A | Differential phase shift keying demodulator | Electricity | 6 | Expired |
| US5665630A | Device separation structure and semiconductor device improved in wiring structure | Electricity | 5 | Expired |
| US5306934A | Semiconductor device with buried electrode | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.