Inventor · Kawasaki, JP

Tomoyuki Ishii

64Patents
20h-index
47Co-inventors
88Inventor score

Filing activity: Aug 30, 1989 → Feb 25, 2015

Most-cited inventions

PatentTitleAreaCited byStatus
US6839260B2 Semiconductor device having different types of memory cell arrays stacked in a vertical direction Physics 82 Expired
US6040605A Semiconductor memory device Physics 68 Expired
US6576943B1 Semiconductor device for reducing leak currents and controlling a threshold voltage and using a thin channel structure Electricity 67 Expired
US7468901B2 Semiconductor memory device Physics 65 Active
US7859889B2 Semiconductor memory device Physics 56 Active
US6876023B2 Gain cell type non-volatile memory having charge accumulating region charged or discharged by channel current from a thin film channel path Electricity 50 Expired
US6373452B1 Plasma display panel, method of driving same and plasma display apparatus Electricity 46 Expired
US6787835B2 Semiconductor memories Electricity 46 Expired
US6949782B2 Semiconductor memories Electricity 43 Expired
US7336519B2 Stacked integrated circuit device/data processor device having a flash memory formed on top of a buffer memory Physics 39 Active
US7772053B2 Method for fabrication of semiconductor device Electricity 37 Active
US7177187B2 Semiconductor device having a nonvolatile memory array and an authentication circuit arranged in a vertical stack configuration Physics 35 Expired
US7826266B2 Semiconductor device having global and local data lines coupled to memory mats Physics 29 Active
US5150021A Method of controlling electric power steering apparatus Performing Operations; Transporting 29 Expired
US6646300B2 Semiconductor memory device Electricity 29 Expired
US7570516B2 Three-dimensional semiconductor memory device having a first and second charge accumulation region Physics 26 Active
US7009243B2 Semiconductor memory device Electricity 26 Expired
US6531995B2 Plasma display panel, method of driving same and plasma display apparatus Electricity 21 Expired
US6825525B2 Semiconductor memory device Electricity 20 Expired
US7375399B2 Semiconductor memory device Physics 20 Expired
US6132012A Abnormal condition detecting apparatus and safety apparatus for hydraulic brake boosting system Mechanical Engineering; Lighting; Heating 20 Expired
US5600163A Semiconductor element and semiconductor memory device using the same Electricity 19 Expired
US5444622A Method of controlling electric power steering apparatus Performing Operations; Transporting 17 Expired
US6473333B1 Storage circuit with layered structure element Emerging Cross-Sectional Technologies 16 Expired
US7015540B2 Semiconductor memory device Physics 15 Expired

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