Koki Otsuka
10Patents
8h-index
14Co-inventors
65Inventor score
Filing activity: Oct 1, 1992 → Mar 21, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD376602S | Exhaust manifold for an internal combustion engine | General | 27 | Expired |
| US5636323A | Speech communication apparatus having an echo canceler | Electricity | 25 | Expired |
| USD372250S | Exhaust manifold for an internal combustion engine | General | 25 | Expired |
| US5379338A | Radiotelephone with handset talking function and hand-free talking function | Electricity | 21 | Expired |
| US5400399A | Speech communication apparatus equipped with echo canceller | Electricity | 18 | Expired |
| US6383310B1 | Exhaust equipment member, internal combustion engine system using same, and method for producing such exhaust equipment member | Chemistry; Metallurgy | 12 | Expired |
| US7503304B2 | Internal engine piston and its production method | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5784881A | Multi-part exhaust manifold assembly with welded connections | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US8241558B2 | High-Cr, high-Ni, heat-resistant, austenitic cast steel and exhaust equipment members formed thereby | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US9169543B2 | Precipitation-hardened, martensitic, cast stainless steel having excellent machinability and its production method | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.