Inventor · Osaka, JP

Jun Nakai

59Patents
10h-index
54Co-inventors
81Inventor score

Filing activity: Feb 15, 1985 → Apr 17, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
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.