Youichi Ogawa
10Patents
4h-index
28Co-inventors
60Inventor score
Filing activity: Jun 27, 1983 → Mar 15, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4540897A | Digital modulation signal reading device | Physics | 21 | Expired |
| US4701902A | Automatic loading disc player | Physics | 14 | Expired |
| US4879705A | Automatic loading disc player | Physics | 10 | Expired |
| US4829502A | Automatic loading disc player | Physics | 10 | Expired |
| US5068144A | Perpendicular magnetic recording medium and method for producing the same | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8416940B2 | Subscriber accommodating apparatus, transfer control method, communication system, and program product | Electricity | 1 | Active |
| US8665425B2 | Eccentricity measuring method | Physics | 0 | Active |
| US11252377B2 | Camera device, gas leakage check system, gas leakage check method, and gas leakage check program | Electricity | 0 | Active |
| US7986604B2 | Optical element and optical pickup device | Physics | 0 | Active |
| US9156196B2 | Method of manufacturing optical elements | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.