Joichiro Ezaki
33Patents
11h-index
22Co-inventors
75Inventor score
Filing activity: Apr 20, 1983 → Jan 29, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5080948A | Magnetic recording/reproducing system comprising a glass substrate thin film magnetic disk and a flying magnetic head with defined spacing and surface roughness | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5978176A | Magnetic head for a magnetic disk having a slider with indented portions for providing heat dissipation | Physics | 20 | Expired |
| US4928195A | Improved floating magnetic head for high density recording | Physics | 19 | Expired |
| US6137652A | Thin film magnetic head with separated yoke and pole tips | Physics | 18 | Expired |
| US5094898A | Magnetic recording medium comprising a glass substrate of controlled surface roughness and a magnetic thin film layer of gamma Fe.sub.2 O.sub.3 | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4803577A | Vertical magnetic recording system using rigid disk | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4908727A | Disk with substrate of alumina silicate resin glass | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6930911B2 | Magnetic memory device, method for writing on the same and method for reading from the same | Physics | 14 | Expired |
| US4797765A | Thin film magnetic head having solder-bonded protective plate | Electricity | 13 | Expired |
| US4918556A | Magnetic disk recording and reproducing apparatus | Physics | 13 | Expired |
| US4939604A | Magnetic recording and reproducing apparatus and a magnetic head used for the apparatus | Physics | 13 | Expired |
| US4893203A | Magnetic head | Physics | 11 | Expired |
| US8897061B2 | MTJ cell for an MRAM device and a manufacturing method thereof | Electricity | 9 | Active |
| US7209380B2 | Magnetic memory device and method of reading the same | Electricity | 8 | Expired |
| US6996001B2 | Magnetic memory device, write current drive circuit, and write current drive method | Physics | 7 | Expired |
| US4564877A | Magnetic recording/reproducing system with wide-gapped transducer and method for using same | Physics | 6 | Expired |
| US7277320B2 | Magnetic memory device, sense amplifier circuit and method of reading from magnetic memory device | Electricity | 5 | Expired |
| US5545988A | Waveform signal processor with selective sampling | Physics | 5 | Expired |
| US5847899A | Magnetic disk recording and reproducing apparatus | Physics | 4 | Expired |
| US5072320A | Magnetic recording and reproducing apparatus having improved durability | Physics | 4 | Expired |
| US7342822B2 | Magnetic memory device, write current driver circuit and write current driving method | Physics | 4 | Expired |
| US6515835B2 | Precise positioning actuator actuator for precisely positioning thin-film magnetic head element and head gimbal assembly with the actuator | Electricity | 4 | Expired |
| US7295460B2 | Magnetic memory cell, magnetic memory device, and method of manufacturing magnetic memory device | Electricity | 4 | Expired |
| US7227771B2 | Magnetoresistive effect element and magnetic memory device | Physics | 4 | Expired |
| US4901175A | Magnetic head supporting device | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.