Takuya Ishii
114Patents
15h-index
158Co-inventors
89Inventor score
Filing activity: Jun 22, 1990 → Feb 1, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5905369A | Variable frequency switching of synchronized interleaved switching converters | Electricity | 111 | Expired |
| US5146394A | Fly back converter switching power supply device | Electricity | 91 | Expired |
| US7250746B2 | Current mode switching regulator with predetermined on time | Electricity | 87 | Expired |
| US7714546B2 | Step-up regulator with multiple power sources for the controller | Electricity | 55 | Active |
| US5490052A | Switching power supply | Electricity | 41 | Expired |
| US6882130B2 | Battery-driven electronic device and mobile communication apparatus | Electricity | 35 | Expired |
| US5448465A | Switching power supply without switching induced spike voltages | Electricity | 31 | Expired |
| US7274116B2 | direct-current power supply and battery-powered electronic apparatus equipped with the power supply | Electricity | 30 | Expired |
| US6831448B2 | DC-to-DC converter | Electricity | 27 | Expired |
| US5615098A | AC-DC converter | Electricity | 22 | Expired |
| USD702500S1 | Grill plate | General | 21 | Active |
| US8040121B2 | Switching regulator | Electricity | 19 | Active |
| US5383106A | Regenerative control type switching power source device | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7268525B2 | Buck-boost converter | Electricity | 18 | Active |
| US7348800B2 | Level shift circuit | Electricity | 17 | Active |
| US6477063B2 | Multi-output switching power source apparatus | Emerging Cross-Sectional Technologies | 15 | Expired |
| US7239200B2 | Power amplifying apparatus | Electricity | 14 | Expired |
| US6946820B2 | Multiple output DC-DC converter for providing controlled voltages | Electricity | 12 | Expired |
| US7075277B2 | DC-DC converter | Electricity | 11 | Expired |
| US6349943B1 | Lubricating resin composition seal rings | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US8384367B2 | Step-down switching regulator | Electricity | 9 | Active |
| US5644479A | Switching power supply device | Electricity | 8 | Expired |
| US6476116B1 | Resin compositions and precision sliding parts made of the same | Chemistry; Metallurgy | 8 | Expired |
| US8421424B2 | Current driver circuit | Electricity | 8 | Active |
| US6850401B2 | DC-DC converter | Emerging Cross-Sectional Technologies | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.