Hiroko Iwasaki
33Patents
19h-index
24Co-inventors
77Inventor score
Filing activity: Jul 20, 1989 → Nov 4, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6280684A | Sputtering target, method of producing the target, optical recording medium fabricated by using the sputtering target, and method of fabricating the optical recording medium | Emerging Cross-Sectional Technologies | 220 | Expired |
| US5736657A | Sputtering target | Emerging Cross-Sectional Technologies | 52 | Expired |
| US6329035A | Optical data storage medium capable of reversibly displaying information | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5740149A | Phase-change type optical recording and reproducing method | Physics | 39 | Expired |
| US5100700A | Information recording medium | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5080947A | Information recording medium | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5024927A | Information recording medium | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5011723A | Optical information recording medium | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5761179A | Phase-change optical recording method using pulse width modulation technique | Physics | 34 | Expired |
| US5785828A | Sputtering target for producing optical recording medium | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5298305A | Phase-change type information recording medium | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5646924A | Recording and simultaneous verifying method of phase-changing type of information recording medium | Physics | 28 | Expired |
| US5095479A | Optical information recording medium | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5156693A | Information recording medium | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5620767A | Light reflecting and heat dissipating material and optical information recording medium using the same | Emerging Cross-Sectional Technologies | 26 | Expired |
| US6221557A | Optical information recording medium | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6388978B1 | Optical recording method for a rewritable phase-change optical recording medium | Physics | 23 | Expired |
| US6319368A | Sputtering target, method of producing the target, optical recording medium fabricated by using the sputtering target, and method of forming recording layer for the optical recording medium | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6127016A | Sputtering target, method of producing the target, optical recording medium fabricated by using the sputtering target, and method of fabricating the optical recording medium | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6373802B1 | Method and apparatus for initializing optical recording media | Physics | 16 | Expired |
| US5882493A | Heat treated and sintered sputtering target | Physics | 14 | Expired |
| US6503592B1 | Sputtering target, method of producing the target, optical recording medium fabricated by using the sputtering target, and method of fabricating the optical recording medium | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6660452B2 | Optical information memory medium and display recording method using the same | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5790505A | Optical data recording/reproducing method and apparatus for determing an optimum recording power | Physics | 9 | Expired |
| US6652806B2 | Method of producing a sputtering target | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.