Masaaki Nakayama
110Patents
19h-index
91Co-inventors
89Inventor score
Filing activity: Mar 23, 1977 → Jan 30, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5986705A | Exposure control system controlling a solid state image sensing device | Electricity | 158 | Expired |
| US6073440A | System for detecting deterioration of catalyst for purifying exhaust gas | Emerging Cross-Sectional Technologies | 48 | Expired |
| US6023651A | Internal combustion engine misfire detection with engine acceleration and deceleration correction during a repetitive misfire condition | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US5672817A | Self-diagnostic apparatus of air-fuel ratio control system of internal combustion engine | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US5631025A | Low sodium peritoneal dialysis solution | Human Necessities | 37 | Expired |
| US4898499A | Ball end mill | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5589197A | Low sodium peritoneal dialysis solution | Human Necessities | 35 | Expired |
| US5188488A | End mill | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5629025A | Low sodium peritoneal dialysis solution | Human Necessities | 29 | Expired |
| US5263364A | Apparatus for detecting misfire in multicylinder internal combustion engines | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US4616962A | Cutter insert | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5100268A | Insert clamped tool | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4927303A | Ball end mill | Emerging Cross-Sectional Technologies | 26 | Expired |
| US6082337A | Abnormality detection apparatus for preventing fuel gas emission | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US6463735B2 | Apparatus for detecting deterioration of exhaust gas purifying catalysts | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5017055A | Indexable cutter insert | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5532742A | Image pickup apparatus with horizontal line interpolation function having three image pickup units shifted in vertical phase from one another | Electricity | 22 | Expired |
| US7781043B2 | Disk roll and base material for disk roll | Emerging Cross-Sectional Technologies | 21 | Active |
| US6247464A | Blow-by gas passage abnormality detecting system for internal combustion engines | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5085542A | Indexable cutting insert | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5268758A | Horizontal line interpolation circuit and image pickup apparatus including it | Electricity | 19 | Expired |
| US5727383A | Catalyst deterioration detecting apparatus and exhaust emission control device failure detecting apparatus | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5521636A | Horizontal line interpolation circuit and image pickup apparatus including it | Electricity | 18 | Expired |
| US6587149B1 | Video camera with progressive scanning and dynamic range enlarging modes | Electricity | 18 | Expired |
| US5222392A | Control system with misfire detection function for internal combustion engine | Emerging Cross-Sectional Technologies | 17 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.