Fumio Maruta
10Patents
7h-index
14Co-inventors
59Inventor score
Filing activity: Apr 25, 1980 → Aug 1, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4880687A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4816334A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4889767A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4387136A | Magnetic recording medium and apparatus for preparing the same | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4371590A | Magnetic recording medium with stepwise orientation of deposited metallic particles | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5069967A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5080971A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4452864A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4302510A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4400444A | Magnetic recording media and process of producing them | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.