Inventor · Yokohama, JP

Naoaki Sudo

44Patents
11h-index
15Co-inventors
72Inventor score

Filing activity: Jun 28, 1996 → Oct 28, 2021

Most-cited inventions

PatentTitleAreaCited byStatus
US6400601B1 Nonvolatile semiconductor memory device Physics 77 Expired
US6215352A Reference voltage generating circuit with MOS transistors having a floating gate Physics 67 Expired
US6094374A Nonvolatile semiconductor memory device including sense amplifier having verification circuit Physics 33 Expired
US7936617B2 Nonvolatile semiconductor memory device Physics 31 Active
US5812018A Voltage booster circuit Electricity 29 Expired
US5659503A Nonvolatile semiconductor memory having an improved reference voltage generating circuit Physics 25 Expired
US6141262A Boosting circuit with boosted voltage limited Physics 23 Expired
US6198685A Word-line driving circuit and semiconductor memory device Physics 20 Expired
US6339549B1 Semiconductor storage apparatus having main bit line and sub bit line Physics 15 Expired
US5831844A High voltage generating circuit able to generate positive high voltage and negative high voltage at the same time Electricity 11 Expired
US8452913B2 Semiconductor memory device and method of processing data for erase operation of semiconductor memory device Physics 11 Active
US6301180A Sense amplifier circuit and semiconductor storage device Physics 10 Expired
US6937515B2 Semiconductor memory device Physics 9 Expired
US10304543B2 Semiconductor memory device for improving high temperature data retention Physics 5 Active
US7453117B2 Non-volatile semiconductor memory device Electricity 4 Active
US6456549B1 Sense amplifier circuit and semiconductor storage device Physics 4 Expired
US6456548B2 Sense amplifier circuit and semiconductor storage device Physics 3 Expired
US7733728B2 Non-volatile semiconductor memory device Electricity 3 Active
US9659659B2 Semiconductor memory apparatus and data scrambling method using the same Physics 2 Active
US7671399B2 Semiconductor storage device Electricity 2 Active
US10896736B2 Semiconductor memory device and NAND-type flash memory erase method Physics 1 Active
US10636497B2 Semiconductor memory device, manufacturing method thereof and output method of data strobe signal Physics 1 Active
US6320455A Boost circuit Electricity 1 Expired
US11487343B2 Semiconductor storing apparatus and flash memory operation method Emerging Cross-Sectional Technologies 1 Active
US9947410B2 Non-volatile semiconductor memory device Physics 1 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.