Ryuichi Naito
25Patents
9h-index
18Co-inventors
68Inventor score
Filing activity: Jul 14, 1982 → Jun 8, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5463604A | Optical disc with data recorded at different rates on different zones and recording apparatus, and reproducing apparatus therefor | Physics | 49 | Expired |
| US4611319A | Disc drive control system | Physics | 36 | Expired |
| US4540897A | Digital modulation signal reading device | Physics | 21 | Expired |
| US4535306A | Phase-locked loop detecting circuit | Electricity | 20 | Expired |
| US5025431A | Autochanger of writable discs | Physics | 19 | Expired |
| US4929917A | Phase-locked loop circuit | Physics | 17 | Expired |
| US4544837A | Focus servo control device for an optical system having an initial focus locking operation | Physics | 15 | Expired |
| US5025432A | Autochanger of writable discs including a non-volatile memory for storing most recent defect management information relating to the writable discs | Physics | 11 | Expired |
| US5021894A | Recorded data demodulation circuit | Physics | 10 | Expired |
| US5619484A | Pulling-in circuit for PLL circuit, pulling-in method for PLL circuit, PLL circuit device and apparatus for reproducing optical disc | Physics | 9 | Expired |
| US4679181A | Method for detecting an error in loading a recording disc | Physics | 7 | Expired |
| US5671201A | Pulling-in circuit for PLL circuit, pulling-in method for PLL circuit, PLL circuit device and apparatus for reproducing optical disc | Physics | 7 | Expired |
| US5034934A | Opto-magnetic disk unit with improved dynamic range characteristics and opto-magnetic disk therefor | Physics | 7 | Expired |
| US5646921A | Method and apparatus for reproducing information recorded on CLV disc type record medium | Physics | 6 | Expired |
| US4935618A | Wide bandwidth photoelectric converting circuit | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5677904A | Disc player | Physics | 4 | Expired |
| US4637005A | Focus servo device of a system for reading out recorded information | Physics | 3 | Expired |
| US5001698A | Read-out information signal processing circuit in an optical recording and reproducing system | Physics | 2 | Expired |
| US4636745A | Signal waveform equalizing circuitry | Physics | 2 | Expired |
| US5848049A | Disc player with parallel objective lenses | Physics | 2 | Expired |
| US5023876A | Method and apparatus for detecting finally recorded sector | Physics | 1 | Expired |
| US6262964A | Disc player with objective lens arranged in a zigzag pattern | Physics | 1 | Expired |
| US5953308A | Disc player with alternating ascending/descending guide devices | Physics | 1 | Expired |
| US4486795A | Disc drive servo system | Physics | 1 | Expired |
| US4493068A | Pick-up point dislocation detecting device in recording a disc player | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.