Hideyuki Yamakawa
17Patents
7h-index
28Co-inventors
62Inventor score
Filing activity: Feb 15, 1994 → Apr 25, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5844741A | System for reproducing high-density magnetic record data with viterbi detector for generating quadripartite reproduction data | Physics | 32 | Expired |
| US5625632A | Magnetic disk drive including a data discrimination apparatus capable of correcting signal waveform distortion due to intersymbol interference | Physics | 15 | Expired |
| US5940416A | Digital signal decoding apparatus and a decoding method used therein | Electricity | 15 | Expired |
| US5448424A | AGC circuit and recording and reproducing apparatus using AGC circuit | Physics | 14 | Expired |
| US5553104A | Information recording/reproducing apparatus having a clock timing extraction circuit for extracting a clock signal from an input data signal | Electricity | 14 | Expired |
| US6791776B2 | Apparatus for information recording and reproducing | Physics | 10 | Expired |
| US6980385B2 | Apparatus for information recording and reproducing | Physics | 9 | Expired |
| US6812868B2 | Run length limited code generation method, run length limited code recording/reproducing apparatus, and run length limited code recording/reproduction method | Physics | 3 | Expired |
| US7786667B2 | Organic electroluminescent element comprising a luminescent assist layer | Electricity | 3 | Active |
| US7370266B2 | Digital signal decoding device and digital signal decoding method | Physics | 3 | Expired |
| US7379408B2 | Disk apparatus and method using plural tap coefficient equalization | Physics | 2 | Active |
| US7397751B2 | Optical disk apparatus, method of recording information, and information recording medium | Physics | 1 | Active |
| US7535811B2 | Disk device and disk reproduction method that prevents a wrong reproducing operation when a defect on the disk is determined | Physics | 1 | Active |
| US8194518B2 | Optical disc device and optical disc playback method | Physics | 1 | Active |
| US6975252B2 | Disk apparatus and disk reproducing method | Electricity | 1 | Expired |
| US7403463B2 | Method and apparatus for filtering read signal to three or more cutoff frequencies with two or more bits control line throughout three or more consecutive periods | Physics | 0 | Active |
| US7466253B2 | Integrated circuit, self-test method for the integrated circuit, and optical disc apparatus including the integrated circuit | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.