Masahiro Katsumura
19Patents
4h-index
24Co-inventors
60Inventor score
Filing activity: May 28, 1991 → Apr 22, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5179547A | Phase change optical information recording medium including means for preventing movement of the recorded portion | Physics | 17 | Expired |
| US5446722A | Information recording apparatus having magnetic shield means | Electricity | 14 | Expired |
| US6307826A | Information recording medium and method for recording information thereon | Physics | 14 | Expired |
| US5195080A | Optical recording medium initializing method and apparatus | Physics | 9 | Expired |
| US6695987B2 | Production method for optical disc | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6882615B2 | Optical disc and apparatus for manufacturing a master disc therefor | Electricity | 2 | Expired |
| US6344275B2 | Electrode material for forming stamper and thin film for forming stamper | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7276692B2 | Beam adjusting sample, beam adjusting method and beam adjusting device | Electricity | 2 | Expired |
| US7632628B2 | Stamper and method for production thereof | Performing Operations; Transporting | 1 | Expired |
| USD964277S1 | Box for converter | General | 1 | Active |
| USD1036380S1 | Filter box for converter | General | 0 | Active |
| US8192194B2 | Mold and method for manufacturing the same | Emerging Cross-Sectional Technologies | 0 | Active |
| US12206336B2 | Power converter | Electricity | 0 | Active |
| US6657934B2 | Information recording apparatus and method therefor | Physics | 0 | Expired |
| US7554896B2 | Electron beam recording apparatus | Physics | 0 | Expired |
| US6849390B2 | Stamper-forming electrode material, stamper-forming thin film, and method of manufacturing optical disk | Performing Operations; Transporting | 0 | Expired |
| US7065034B2 | Optical disc and apparatus for manufacturing a master disc therefor | Electricity | 0 | Expired |
| US7225192B2 | Hybrid recording medium and information recording apparatus | Physics | 0 | Expired |
| US8335146B2 | Master disk exposing apparatus and the adjusting method therefor | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.