Naomasa Nakamura
68Patents
7h-index
36Co-inventors
72Inventor score
Filing activity: Feb 24, 1987 → Oct 4, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6554972B1 | Information recording medium and its manufacturing method | Emerging Cross-Sectional Technologies | 52 | Expired |
| US7214416B2 | Phase-change optical recording medium | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5396480A | Method and apparatus for recording information using an energy beam of power levels changed stepwise | Physics | 22 | Expired |
| US5431978A | Information recording medium and recording method using the same | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5776574A | Optical recording medium and optical recording/reproducing apparatus | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6296915A | Optical recording medium | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6805935B2 | Optical recording medium | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5431975A | Optical recording medium and optical recording/reproducing apparatus | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7455951B2 | Information recording medium and its manufacturing method | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6944116B2 | Optical information recording medium | Physics | 4 | Expired |
| US4803660A | Optical recording medium | Physics | 4 | Expired |
| US6842419B2 | Optical information recording medium and optical disk drive | Physics | 3 | Expired |
| US7357969B2 | Phase-change optical recording medium | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6165579A | Optical information recording medium and recording/reproduction method | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7335459B2 | Phase-change optical recording medium | Physics | 3 | Expired |
| US7858166B2 | Phase change recording medium | Emerging Cross-Sectional Technologies | 2 | Active |
| US7869339B2 | Multi-layer optical disc, information recording method and information reproducing method | Physics | 2 | Active |
| US8154971B2 | Optical recording medium, information recording method, and information reproducing method | Physics | 1 | Active |
| US7294382B2 | Phase-change optical recording medium | Emerging Cross-Sectional Technologies | 1 | Active |
| US7864654B2 | Optical recording medium, information recording method, and information reproducing method | Physics | 1 | Active |
| US7510753B2 | Phase-change optical recording media | Physics | 1 | Active |
| US8139459B2 | Optical recording medium, information recording method, and information reproducing method | Physics | 1 | Active |
| US7995442B2 | Optical recording medium, information recording method, and information reproducing method | Physics | 1 | Active |
| US7110348B2 | Optical information recording medium | Physics | 1 | Expired |
| US7767285B2 | Phase-change optical recording medium | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.