Inventor · Yokohama, JP

Toru Ishikawa

132Patents
15h-index
116Co-inventors
89Inventor score

Filing activity: Dec 27, 1989 → Apr 22, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US5635760A Surface mount semiconductor device Emerging Cross-Sectional Technologies 80 Expired
US5521870A Semiconductor memory device having a coincidence detection circuit and its test method Physics 74 Expired
US5337283A Dynamic random access memory device Physics 34 Expired
US6509776B2 DLL circuit, semiconductor device using the same and delay control method Emerging Cross-Sectional Technologies 29 Expired
US7567476B2 Semiconductor memory device and testing method thereof Physics 26 Active
US5416790A Semiconductor laser with a self-sustained pulsation Electricity 25 Expired
US7017796B2 Method of manufacturing paper packaging container and paper packaging container Performing Operations; Transporting 18 Expired
US5719814A Semiconductor memory device capable of storing high potential level of data Physics 17 Expired
US8624401B2 Semiconductor device having chip crack detection structure Electricity 17 Active
US6125076A Word line control circuit Physics 17 Expired
US5367495A Random access memory having control circuit for maintaining activation of sense amplifier even after non-selection of word line Physics 17 Expired
US5020066A Surface-emitting-type semiconductor laser device Electricity 16 Expired
US6392951B2 Semiconductor storage device Physics 16 Expired
US8803308B2 Semiconductor device having chip crack detection structure Electricity 16 Active
US7759998B2 Timing adjustment circuit Electricity 15 Active
US5243576A Semiconductor memory device Physics 13 Expired
US11315620B2 Semiconductor device performing row hammer refresh operation Physics 13 Active
US7137022B2 Timing adjustment circuit and semiconductor device including the same Electricity 13 Expired
US5748018A Data transfer system for an integrated circuit, capable of shortening a data transfer cycle Electricity 12 Expired
US5374977A Apparatus for detecting and controlling a toner run-out in a developing unit Physics 12 Expired
US5124752A Developing apparatus Physics 11 Expired
US5506170A Method of making a semiconductor laser with a self-sustained pulsation Electricity 11 Expired
US6349183B1 Image forming apparatus Physics 11 Expired
US6937081B2 Delay producing method, delay adjusting method based on the same, and delay producing circuit and delay adjusting circuit applied with them Electricity 10 Expired
US6069494A Method and apparatus for interfacing semiconductor devices for transfer therebetween having a serial bus for transmitting amplitude data from a master device to a slave device Electricity 10 Expired

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