Keiichi Yamada
95Patents
18h-index
154Co-inventors
87Inventor score
Filing activity: Dec 19, 1978 → Feb 24, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7523036B2 | Text-to-speech synthesis system | Physics | 266 | Active |
| US6055536A | Information processing apparatus and information processing method | Emerging Cross-Sectional Technologies | 176 | Expired |
| US4546739A | Fuel injection valve with variable discharge area of nozzle holes | Mechanical Engineering; Lighting; Heating | 48 | Expired |
| US5517242A | Image sensing device having expanded dynamic range | Electricity | 48 | Expired |
| US5253336A | Method for fitting third-degree Bezier curves to series of data points | Physics | 42 | Expired |
| US5231697A | Method and system for determining connection states of straight short vectors representing figure in curve fitting | Physics | 32 | Expired |
| US4963463A | Radiation-sensitive resin composition with admixtures of O-quinone diazide and acid esters having nitrobenzyl or cyanobenzyl group | Chemistry; Metallurgy | 29 | Expired |
| US6153918A | Semiconductor device with improved planarity and reduced parasitic capacitance | Electricity | 27 | Expired |
| US8983846B2 | Information processing apparatus, information processing method, and program for providing feedback on a user request | Electricity | 25 | Active |
| US5437836A | Method of and container for treating waste liquid containing body fluid | Human Necessities | 22 | Expired |
| US4586480A | Electronically controlled distributor type fuel injection pump | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4528951A | Fuel injection valve for internal combustion engines | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4886565A | Reactive ion etching apparatus | Electricity | 19 | Expired |
| US7126460B2 | Surrounding conditions display apparatus | Performing Operations; Transporting | 19 | Expired |
| US6267479A | Semiconductor device, and method for manufacturing the same | Electricity | 19 | Expired |
| US7065257B2 | Image processing method and apparatus | Electricity | 18 | Expired |
| US4678160A | Solenoid valve | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4622942A | Fuel injection apparatus for internal combustion engines | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5807337A | Liquid infusion apparatus | Human Necessities | 16 | Expired |
| US7720775B2 | Learning equipment and learning method, and robot apparatus | Physics | 14 | Expired |
| US6042144A | Passenger side air bag | Performing Operations; Transporting | 14 | Expired |
| US4262645A | Injection timing control device for distributor-type fuel injection pump | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5237649A | Method and system for acquiring interpolation points from straight short vectors representing figure in curve fitting | Physics | 14 | Expired |
| US4271808A | Fuel injection pump for internal combustion engines | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US7099826B2 | Text-to-speech synthesis system | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.