Ryoichi Ohara
30Patents
11h-index
34Co-inventors
71Inventor score
Filing activity: Apr 16, 1999 → Mar 7, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7135940B2 | Tunable filter and portable telephone | Electricity | 49 | Expired |
| US7268647B2 | Film bulk acoustic-wave resonator and method for manufacturing the same | Emerging Cross-Sectional Technologies | 39 | Active |
| US7463117B2 | Film bulk acoustic-wave resonator (FBAR), filter implemented by FBARs and method for manufacturing FBAR | Electricity | 30 | Expired |
| US7420320B2 | Piezoelectric thin film device and method for manufacturing the same | Emerging Cross-Sectional Technologies | 28 | Active |
| US7323805B2 | Piezoelectric thin film device and method for manufacturing the same | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6870445B2 | Thin film bulk acoustic wave resonator | Electricity | 17 | Expired |
| US6077406A | Sputtering system | Electricity | 17 | Expired |
| US7498904B2 | Piezoelectric thin film resonator and devices provided with the same | Electricity | 15 | Active |
| US6809604B2 | Voltage control oscillator having a ferroelectric thin film perovskite single crystal resonator | Electricity | 14 | Expired |
| US6747529B2 | Piezoelectric thin film resonator and frequency variable resonator using the resonator | Electricity | 14 | Expired |
| US7187253B2 | Film bulk acoustic-wave resonator and method for manufacturing the same | Emerging Cross-Sectional Technologies | 12 | Expired |
| US8134224B2 | Radio frequency semiconductor device | Electricity | 11 | Active |
| US7221920B2 | Voltage controlled oscillator, frequency synthesizer and communication apparatus | Electricity | 8 | Expired |
| US6870446B2 | High frequency filter | Electricity | 7 | Expired |
| US8866151B2 | Semiconductor device | Electricity | 5 | Active |
| US7525399B2 | Thin-film piezoelectric resonator, filter and voltage-controlled oscillator | Electricity | 4 | Active |
| US7501739B2 | Thin film piezoelectric resonator and manufacturing process thereof | Electricity | 4 | Expired |
| US9142687B2 | Semiconductor diode device | Electricity | 4 | Active |
| US7709999B2 | Thin film piezoelectric resonator and method of manufacturing the same | Emerging Cross-Sectional Technologies | 4 | Active |
| US7459833B2 | Thin film piezoelectric actuator | Electricity | 3 | Active |
| US7675222B2 | Thin film piezoelectric actuator | Electricity | 3 | Active |
| US7560853B2 | Thin film piezoelectric resonator, method of manufacturing the same, and filter including the same | Electricity | 2 | Active |
| US7777592B2 | Antenna sharing device and portable telephone | Electricity | 2 | Active |
| US9178079B2 | Semiconductor diode device | Electricity | 2 | Active |
| US8558244B2 | Semiconductor device and method for manufacturing semiconductor device | Electricity | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.