Yoshiyuki Ishizawa
28Patents
11h-index
18Co-inventors
72Inventor score
Filing activity: Jun 20, 1979 → Sep 15, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6385389B1 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 142 | Expired |
| US7155112B2 | Video data recording medium, video data recording apparatus and video playback apparatus | Electricity | 121 | Expired |
| US6453119B1 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 64 | Expired |
| US6338139B1 | Information reproducing apparatus, authenticating apparatus, and information processing system | Electricity | 60 | Expired |
| US6819862B1 | Video data recording medium, video data recording apparatus and video data playback apparatus | Electricity | 46 | Expired |
| US6289166A | Video data recording medium, video data recording apparatus and video data playback apparatus | Electricity | 34 | Expired |
| US5535186A | Disc recording/reproducing system | Physics | 18 | Expired |
| US4270177A | Digital amplitude control for digital audio signal | Electricity | 16 | Expired |
| US5666338A | Recording medium formatted for error correction and density recording and an apparatus for recording information thereon and/or recording information therefrom | Physics | 14 | Expired |
| US4353060A | Analog to digital converter system with an output stabilizing circuit | Electricity | 14 | Expired |
| US6741798B2 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 11 | Expired |
| US6559779B2 | Data encoding method, apparatus, and storage medium | Physics | 9 | Expired |
| US5579003A | Digital data modulation/demodulation system wherein the modulated data satisfies a minimum run number of zeros | Electricity | 8 | Expired |
| US6983413B2 | Data processing method using error-correcting code and an apparatus using the same method | Physics | 7 | Expired |
| US6674959B2 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 6 | Expired |
| US6671458B2 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 5 | Expired |
| US6560407B2 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 4 | Expired |
| US7512046B2 | Optical disk apparatus and method for controlling the same | Physics | 4 | Active |
| US5956306A | Recording medium, signal recording apparatus thereof and signal reproducing apparatus thereof | Physics | 4 | Expired |
| US6532336B2 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 4 | Expired |
| US5848051A | Recording medium formatted for error correction and high density recording and an apparatus for recording information thereon and/or reproducing information therefrom | Physics | 2 | Expired |
| US5729224A | Code conversion and demodulation apparatus, a method thereof, and a recording medium | Electricity | 2 | Expired |
| US5909417A | Recording medium formatted for error correction and high density recording and an apparatus for recording information thereon and/or reproducing information therefrom | Physics | 2 | Expired |
| US6668135B2 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 2 | Expired |
| US5757296A | Data decoding apparatus and method and recording medium | Electricity | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.