Toshio Yokoyama
59Patents
16h-index
98Co-inventors
87Inventor score
Filing activity: Mar 19, 1987 → Nov 18, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5132604A | Engine starter and electric generator system | Mechanical Engineering; Lighting; Heating | 73 | Expired |
| US6012428A | Method for controlling air-fuel ratio in internal combustion engine | Emerging Cross-Sectional Technologies | 69 | Expired |
| US5803048A | System and method for controlling air-fuel ratio in internal combustion engine | Emerging Cross-Sectional Technologies | 68 | Expired |
| US4796354A | Method of manufacturing a position sensor for detecting angular position | Emerging Cross-Sectional Technologies | 67 | Expired |
| US5386372A | Vibration/noise control system for vehicles | Physics | 56 | Expired |
| US5390632A | Engine cooling system | Mechanical Engineering; Lighting; Heating | 41 | Expired |
| US4810967A | Position sensor for detecting angular position | Electricity | 32 | Expired |
| US5598648A | Apparatus for controlling straight excavating operation with hydraulic excavator | Fixed Constructions | 31 | Expired |
| US6470606B1 | Vehicle having apparatus for monitoring forward portion of blade and method of monitoring forward portion of blade | Fixed Constructions | 29 | Expired |
| US5274557A | Teaching and playback method for work machine | Fixed Constructions | 28 | Expired |
| US5148676A | Confluence valve circuit of a hydraulic excavator | Fixed Constructions | 28 | Expired |
| US5029067A | Operation control device | Physics | 23 | Expired |
| US5114130A | Recorded sheet handling apparatus | Emerging Cross-Sectional Technologies | 23 | Expired |
| US7087117B2 | Substrate processing apparatus and substrate processing method | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5176504A | Apparatus for controlling hydraulic pumps for construction machine | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4988085A | Recorded sheet handling apparatus | Physics | 16 | Expired |
| US7466337B2 | Construction machine | Fixed Constructions | 15 | Expired |
| US5197860A | Hydraulic apparatus for construction machines | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4808934A | Position sensor for detecting angular position | Physics | 13 | Expired |
| US5532809A | Copying machine having automatic document feeding device | Physics | 11 | Expired |
| US5243947A | Fuel injection control system for internal combustion engines | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7368016B2 | Substrate processing unit and substrate processing apparatus | Electricity | 10 | Expired |
| US7442257B2 | Substrate processing apparatus and substrate processing method | Emerging Cross-Sectional Technologies | 8 | Active |
| US6824613B2 | Substrate processing apparatus | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7575636B2 | Substrate processing apparatus and substrate processing method | Emerging Cross-Sectional Technologies | 7 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.