Katsumi Kawahara
18Patents
10h-index
17Co-inventors
65Inventor score
Filing activity: Jul 30, 1990 → May 25, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6153063A | Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information | Physics | 48 | Expired |
| US6268034A | Optical information recording medium and method for producing the same, method for recording and reproducing information thereon and recording/reproducing apparatus | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5194363A | Optical recording medium and production process for the medium | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5681632A | Optical information recording medium | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6858277B1 | Information recording medium and method for manufacturing the same | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5684778A | Initialization process for a phase change recording medium with a zero level drop in flash light emission | Physics | 19 | Expired |
| US5395669A | Optical record medium | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6503690B1 | Optical information recording medium, method for producing the same, and method for recording and reproducing optical information | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6821707B2 | Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5453346A | Optical information recording medium having protection layers with different properties on both sides of an optical active layer | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6807142B1 | Optical information recording medium and method for initializing the same | Physics | 10 | Expired |
| US5151295A | Process for manufacturing an optical recording medium | Physics | 10 | Expired |
| US5230973A | Method of recording and erasing information in an erasible optical recording medium | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7037413B1 | Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6060221A | Method and apparatus for initializing optical recording medium | Physics | 5 | Expired |
| USRE36383E | Optical recording medium and production process for the medium | General | 4 | Expired |
| US5753334A | Optical recording medium | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5587216A | Optical recording medium | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.