Masahiro Okamura
33Patents
11h-index
57Co-inventors
78Inventor score
Filing activity: Dec 19, 1974 → Feb 16, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4745088A | Vapor phase growth on semiconductor wafers | Emerging Cross-Sectional Technologies | 127 | Expired |
| US5247126A | Image reproducing apparatus, image information recording medium, and musical accompaniment playing apparatus | Electricity | 116 | Expired |
| US6310582A | Antenna system | Electricity | 50 | Expired |
| US4649990A | Heat-conducting cooling module | Electricity | 45 | Expired |
| US4223328A | Field controlled thyristor with dual resistivity field layer | Electricity | 36 | Expired |
| US5235124A | Musical accompaniment playing apparatus having phoneme memory for chorus voices | Physics | 32 | Expired |
| US4083062A | Avalanche photodiode with reduced avalanche breakdown voltage | Electricity | 24 | Expired |
| US4514747A | Field controlled thyristor with double-diffused source region | Electricity | 23 | Expired |
| US4079405A | Semiconductor photodetector | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6813508B1 | Apparatus and method for mobile communication | Electricity | 17 | Expired |
| US4016593A | Bidirectional photothyristor device | Electricity | 14 | Expired |
| US6980814B2 | Mobile communication system with mobile station position detection | Electricity | 11 | Expired |
| US5218580A | User management system for musical accompaniment playing apparatus | Physics | 11 | Expired |
| US3968019A | Method of manufacturing low power loss semiconductor device | Electricity | 11 | Expired |
| US4110781A | Bidirectional grooved thyristor fired by activation of the beveled surfaces | Electricity | 11 | Expired |
| US4201598A | Electron irradiation process of glass passivated semiconductor devices for improved reverse characteristics | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4388635A | High breakdown voltage semiconductor device | Electricity | 10 | Expired |
| US4040084A | Semiconductor device having high blocking voltage with peripheral circular groove | Electricity | 10 | Expired |
| US4210464A | Method of simultaneously controlling the lifetimes and leakage currents in semiconductor devices by hot electron irradiation through passivating glass layers | Electricity | 10 | Expired |
| US6546258B1 | Communication apparatus and communication method | Electricity | 9 | Expired |
| US4354121A | Field controlled thyristor control circuit with additional FCT in reverse bias circuit | Electricity | 8 | Expired |
| US4216487A | Bidirectional light-activated thyristor having substrate optical isolation | Electricity | 7 | Expired |
| US6744225B2 | Ion accelerator | Electricity | 7 | Expired |
| US4258377A | Lateral field controlled thyristor | Electricity | 4 | Expired |
| US6701468B1 | Code error correcting circuit, code error correcting method, communicating apparatus and communicating method | Electricity | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.