Yuji Takahashi
293Patents
29h-index
416Co-inventors
93Inventor score
Filing activity: Jun 12, 1975 → Feb 19, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USRE36923E | Sheet stapler | General | 486 | Expired |
| US5808592A | Integrated light-emitting diode lamp and method of producing the same | Emerging Cross-Sectional Technologies | 187 | Expired |
| US4900009A | Sorter | Performing Operations; Transporting | 184 | Expired |
| US6791116B2 | Light emitting diode | Electricity | 99 | Expired |
| US7176903B2 | Piezoelectric element and touch screen utilizing the same | Electricity | 73 | Expired |
| US6492669B2 | Semiconductor device with schottky electrode having high schottky barrier | Electricity | 72 | Expired |
| US7332746B1 | Light-emitting apparatus | Electricity | 71 | Expired |
| US7345521B2 | High frequency switch circuit | Electricity | 66 | Expired |
| US4591884A | Multi-function image recording apparatus | Physics | 66 | Expired |
| US7263890B2 | Vacuum clamping detection method and vacuum clamping detector | Emerging Cross-Sectional Technologies | 62 | Expired |
| US6465814B2 | Semiconductor device | Electricity | 61 | Expired |
| US7200287B2 | Method and apparatus for image processing, and a computer product | Physics | 56 | Expired |
| US5351112A | Original feeding apparatus and image forming system with it | Physics | 56 | Expired |
| US6729746B2 | Light source device | Emerging Cross-Sectional Technologies | 55 | Expired |
| US6373082B1 | Compound semiconductor field effect transistor | Electricity | 53 | Expired |
| US6943379B2 | Light emitting diode | Electricity | 48 | Expired |
| US6540377B1 | Full-color light source unit | Electricity | 47 | Expired |
| US6717355B2 | Light-emitting unit | Electricity | 47 | Expired |
| US6552373B2 | Hetero-junction field effect transistor having an intermediate layer | Electricity | 41 | Expired |
| US5230457A | Sheet stapler | Performing Operations; Transporting | 40 | Expired |
| US5777861A | Power supply apparatus having high power-factor and low distortion-factor characteristics | Emerging Cross-Sectional Technologies | 39 | Expired |
| US6953265B2 | Light source device | Emerging Cross-Sectional Technologies | 39 | Expired |
| US6841931B2 | LED lamp | Electricity | 38 | Expired |
| US6872585B2 | LED device and manufacturing method thereof | Electricity | 38 | Expired |
| US5822488A | Single-mode optical fiber with plural core portions | Physics | 35 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.