Inventor · Yokohama, JP

Takayuki Tsukamoto

93Patents
7h-index
72Co-inventors
75Inventor score

Filing activity: Nov 30, 1999 → Feb 23, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US7214416B2 Phase-change optical recording medium Emerging Cross-Sectional Technologies 32 Expired
US6353309B1 Switching circuit having a switching semiconductor device and control method thereof Electricity 19 Expired
US7948790B2 Semiconductor memory device Physics 17 Active
US7883930B2 Phase change memory including a plurality of electrically conductive bodies, and manufacturing method thereof Emerging Cross-Sectional Technologies 15 Active
US8274815B2 Nonvolatile semiconductor memory device Physics 12 Active
US7245576B2 Optical recording medium and optical recording-reproducing method Physics 11 Expired
US7060393B2 Optical recording medium and optical recording apparatus Physics 8 Expired
US8085577B2 Nonvolatile semiconductor memory device and method of data write/data erase therein Physics 7 Active
US8319611B2 Radio frequency indentification tag Electricity 6 Active
US8089796B2 Information recording and reproducing device Physics 6 Active
US9252358B2 Semiconductor memory device and method of manufacturing the same Electricity 5 Active
US7995382B2 Information recording and reproducing apparatus Physics 5 Active
US8581424B2 Information recording/reproducing device Electricity 5 Active
US9099180B2 Semiconductor memory device Physics 5 Active
US8237145B2 Nonvolatile memory device with recording layer having two portions of different nitrogen amounts Emerging Cross-Sectional Technologies 5 Active
US8320157B2 Nonvolatile semiconductor memory device Physics 4 Active
US9281345B2 Resistance change type memory device with three-dimensional structure Electricity 4 Active
US8759806B2 Semiconductor memory device Electricity 4 Active
US8279655B2 Non-volatile semiconductor memory device and method of controlling non-volatile semiconductor memory device Physics 4 Active
US8374571B2 Semiconductor integrated circuit and operating method thereof Electricity 4 Active
US8410540B2 Non-volatile memory device including a stacked structure and voltage application portion Physics 4 Active
US8207518B2 Information recording and reproducing device Physics 4 Active
US8014189B2 Information recording/reproducing device Physics 4 Active
US6545971B1 Information recording/reproducing system for recording/reproducing information in three-dimensional recording medium of a light passing-through type Physics 4 Expired
US8320158B2 Nonvolatile semiconductor memory device Physics 3 Active

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