Kiyoshi Nakamura
97Patents
23h-index
174Co-inventors
91Inventor score
Filing activity: Mar 7, 1973 → Apr 25, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5361196A | Power converter for converting DC voltage into AC phase voltage having three levels of positive, zero and negative voltage | Emerging Cross-Sectional Technologies | 79 | Expired |
| US5298697A | Apparatus and methods for detecting number of people waiting in an elevator hall using plural image processing means with overlapping fields of view | Performing Operations; Transporting | 68 | Expired |
| US5321599A | Control apparatus for suppressing a third harmonic neutral point voltage in a three level inverter | Electricity | 55 | Expired |
| US4381478A | Control system for a linear synchronous motor | Emerging Cross-Sectional Technologies | 52 | Expired |
| US5408607A | Information transfer system | Emerging Cross-Sectional Technologies | 50 | Expired |
| US5177677A | Power conversion system | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5258586A | Elevator control system with image pickups in hall waiting areas and elevator cars | Performing Operations; Transporting | 46 | Expired |
| US5620370A | Blowing apparatus, suction panel therefor and straightening guide therefor | Mechanical Engineering; Lighting; Heating | 41 | Expired |
| US5250890A | Inverter control apparatus | Electricity | 40 | Expired |
| US5627742A | Three level power converting apparatus having means for balancing DC component thereof | Performing Operations; Transporting | 40 | Expired |
| US4701682A | Control system for maintaining traction of rolling stock | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4068152A | Power supply system for a linear motor | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4359022A | Valve for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US4348618A | Feeding system for linear motor type transporting system | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5742493A | Power conversion apparatus | Performing Operations; Transporting | 28 | Expired |
| US4454457A | Power supply system for a linear motor | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4799161A | Control apparatus for maintaining traction in electric rolling stock | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4419971A | Cylinder liner for an internal combustion engine | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4634300A | Rotating member supporting apparatus | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5307903A | Method and system of controlling elevators and method and apparatus of inputting requests to the control system | Performing Operations; Transporting | 25 | Expired |
| US5125347A | Power supply system for a linear motor type transportation system | Performing Operations; Transporting | 24 | Expired |
| US5506765A | Control apparatus of power converter and control apparatus of electric motor vehicle | Performing Operations; Transporting | 23 | Expired |
| US5892190A | Method and system of controlling elevators and method and apparatus of inputting requests to the control system | Performing Operations; Transporting | 23 | Expired |
| US5389749A | Elevator system | Electricity | 22 | Expired |
| US4689530A | Power supply apparatus for linear motor | Emerging Cross-Sectional Technologies | 22 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.