Masaharu Watanabe
34Patents
12h-index
50Co-inventors
84Inventor score
Filing activity: Jun 25, 1975 → Mar 10, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4597868A | Body fluid filter device | Performing Operations; Transporting | 68 | Expired |
| US4035304A | Blood filtering bag | Human Necessities | 66 | Expired |
| US4304670A | Blood filter with air trap and distributing chamber | Human Necessities | 62 | Expired |
| US5098852A | Method of manufacturing a semiconductor device by mega-electron volt ion implantation | Electricity | 43 | Expired |
| US4340953A | Information recording medium and recording and reproducing system using the same | Physics | 37 | Expired |
| US4678566A | Apparatus for separating proteins from blood plasma | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4631130A | Plasma separator | Performing Operations; Transporting | 26 | Expired |
| US4774019A | Agent for precipitative separation of proteins from blood plasma | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6224765A | Filter element | Performing Operations; Transporting | 15 | Expired |
| US4649408A | Charge storage type semiconductor device and method for producing same | Electricity | 13 | Expired |
| US4940562A | Filter element and method for manufacture thereof and micro-filtration filter having the filter element | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5073952A | Pattern recognition device | Physics | 13 | Expired |
| US4298410A | Method for growing a liquid phase epitaxial layer on a semiconductor substrate | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4971861A | Polyvinyl alcohol fiber and method of manufacture thereof | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5598025A | Semiconductor device comprises an impurity layer having boron ions in the form of clusters of icosahedron structure | Electricity | 11 | Expired |
| US4564416A | Method for producing a semiconductor device | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5247585A | Object recognition device | Performing Operations; Transporting | 8 | Expired |
| US4515755A | Apparatus for producing a silicon single crystal from a silicon melt | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5289031A | Semiconductor device capable of blocking contaminants | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6140007A | Photosensitive compositions and pattern formation method | Physics | 4 | Expired |
| US5505858A | Polyolefin filter element and method for the production thereof | Performing Operations; Transporting | 4 | Expired |
| US6342330B2 | Photosensitive compositions and pattern formation method | Physics | 4 | Expired |
| US6174727A | Method of detecting microscopic defects existing on a silicon wafer | Physics | 4 | Expired |
| US5413943A | Semiconductor device and method of manufacturing the same | Electricity | 3 | Expired |
| US5108806A | Heat-sealable polybutylene terephthalate film | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.