Hitoshi Iwasaki
243Patents
34h-index
108Co-inventors
93Inventor score
Filing activity: Jul 24, 1984 → Aug 5, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5549978A | Magnetoresistance effect element | Emerging Cross-Sectional Technologies | 145 | Expired |
| US6338899B1 | Magnetoresistance effect element, magnetic head, magnetic head assembly, magnetic storage system | Emerging Cross-Sectional Technologies | 132 | Expired |
| US7957098B2 | Magnetic recording head and magnetic recording apparatus | Physics | 101 | Active |
| US6303218A | Multi-layered thin-film functional device and magnetoresistance effect element | Emerging Cross-Sectional Technologies | 88 | Expired |
| US6313973A | Laminated magnetorestrictive element of an exchange coupling film, an antiferromagnetic film and a ferromagnetic film and a magnetic disk drive using same | Physics | 88 | Expired |
| US10186284B2 | Magnetic head and magnetic recording and reproducing device | Physics | 82 | Active |
| US5304975A | Magnetoresistance effect element and magnetoresistance effect sensor | Physics | 78 | Expired |
| US8320079B2 | Magnetic head assembly and magnetic recording/reproducing apparatus | Physics | 67 | Active |
| US5949622A | Magnetoresistance effect element | Physics | 66 | Expired |
| US8154825B2 | Magnetic recording head and magnetic recording device | Physics | 65 | Active |
| US8270112B2 | Magnetic head with spin oscillation device(s) and magnetic recording device | Physics | 64 | Active |
| US6937446B2 | Magnetoresistance effect element, magnetic head and magnetic recording and/or reproducing system | Emerging Cross-Sectional Technologies | 63 | Expired |
| US6348274B1 | Magnetoresistive element and magnetic recording apparatus | Emerging Cross-Sectional Technologies | 60 | Expired |
| US8048492B2 | Magnetoresistive effect element and manufacturing method thereof | Emerging Cross-Sectional Technologies | 55 | Active |
| US6118624A | Magneto-resistance effect element having a magnetic biasing film | Electricity | 54 | Expired |
| US5576915A | Magnetoresistive head with antiferromagnetic sublayers interposed between first and second spin-valve units to exchange bias inner magnetic films thereof | Physics | 52 | Expired |
| US5780176A | Magnetoresistance effect element | Emerging Cross-Sectional Technologies | 46 | Expired |
| US7791829B2 | Apparatus for assisting write operation using high frequency magnetic field in disk drive | Physics | 46 | Active |
| US5416353A | Netoresistance effect element | Physics | 45 | Expired |
| US6747538B2 | Inductance device | Electricity | 43 | Expired |
| US6064552A | Magnetoresistive head having magnetic yoke and giant magnetoresistive element such that a first electrode is formed on the giant magnetoresistive element which in turn is formed on the magnetic yoke which acts as a second electrode | Physics | 42 | Expired |
| US5905611A | Thin film magnetic head responsive to spin-dependent scattering | Emerging Cross-Sectional Technologies | 41 | Expired |
| US6495275B2 | Multi-layered thin-film functional device and magnetoresistance effect element | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5768066A | Magnetoresistive head having an antiferromagnetic layer interposed between first and second magnetoresistive elements | Physics | 41 | Expired |
| US6784509B2 | Magnetoresistance effect element, magnetic head and magnetic reproducing apparatus | Electricity | 40 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.