Jun Nakai
59Patents
10h-index
54Co-inventors
81Inventor score
Filing activity: Feb 15, 1985 → Apr 17, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5239412A | Solid image pickup device having microlenses | Electricity | 158 | Expired |
| US4837802A | Radio communication method and system | Electricity | 78 | Expired |
| US4697212A | Method and apparatus for recording a digital information signal | Physics | 34 | Expired |
| US7017090B2 | Semiconductor module including semiconductor memory device shiftable to test mode as well as semiconductor memory device used therein | Physics | 32 | Expired |
| US8559236B2 | Nonvolatile semiconductor memory device which performs improved erase operation | Physics | 19 | Active |
| US6385115B1 | Semiconductor memory device with sense amplifier power supply configuration capable of supplying stable power supply voltage to sense amplifiers | Physics | 16 | Expired |
| US5956281A | Semiconductor memory device capable of setting substrate voltage shallow in disturb test mode and self refresh mode | Physics | 14 | Expired |
| US7551507B2 | Power supply circuit and semiconductor memory | Physics | 11 | Active |
| US5694365A | Semiconductor memory device capable of setting the magnitude of substrate voltage in accordance with the mode | Physics | 11 | Expired |
| US5530397A | Reference voltage generating circuit of semiconductor memory device | Physics | 10 | Expired |
| US9025390B2 | Nonvolatile semiconductor memory device which performs improved erase operation | Physics | 9 | Active |
| US9754672B2 | Nonvolatile semiconductor memory device which performs improved erase operation | Physics | 8 | Active |
| US9437308B2 | Nonvolatile semiconductor memory device which performs improved erase operation | Physics | 7 | Active |
| US5123043A | Radio communication method and system | Electricity | 7 | Expired |
| US7742358B2 | Power supply circuit and semiconductor memory | Physics | 5 | Active |
| US8542214B2 | Image display device | Physics | 5 | Active |
| US6249462A | Data output circuit that can drive output data speedily and semiconductor memory device including such a data output circuit | Physics | 4 | Expired |
| US9354561B1 | Image forming apparatus and light guide member | Physics | 3 | Active |
| US7034858B2 | LED array exposure device, controlling method thereof, and image forming apparatus using the same | Electricity | 3 | Expired |
| US10685715B2 | Nonvolatile semiconductor memory device which performs improved erase operation | Physics | 3 | Active |
| US6226208A | Semiconductor memory device with hierarchical control signal lines | Physics | 3 | Expired |
| US10157675B2 | Nonvolatile semiconductor memory device which performs improved erase operation | Physics | 3 | Active |
| US11062777B2 | Nonvolatile semiconductor memory device which performs improved erase operation | Physics | 3 | Active |
| US9400469B2 | Image forming apparatus and method of warning life of charging roller in image forming apparatus | Physics | 3 | Active |
| US8743170B2 | Optical scanning apparatus and image forming apparatus | Electricity | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.