Masami Ishikawa
39Patents
10h-index
73Co-inventors
78Inventor score
Filing activity: Dec 31, 1979 → Aug 29, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5333501A | Abnormality monitoring apparatus for a pipeline | Physics | 79 | Expired |
| US5389825A | System of controlling changeover of an electric power source for an electric motor vehicle | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5853331A | Amusement ride | Human Necessities | 19 | Expired |
| US7084591B2 | Electric drive control device, electric drive control method, and program of same | Electricity | 15 | Expired |
| US6518182B1 | Via-filling process | Electricity | 15 | Expired |
| US5644558A | Recording and/or reproducing apparatus for disc-shaped recording medium | Physics | 15 | Expired |
| US7187098B2 | Axial gap rotating electrical machine | Electricity | 14 | Expired |
| US5969500A | Control system and method for motors | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5140157A | Double beam scan type optical apparatus | Electricity | 11 | Expired |
| US6313812A | Single remote control system for plurality of audio and visual equipment | Electricity | 10 | Expired |
| US5776659A | Ionizing radiation exposure method utilizing water soluble aniline antistatic polymer layer | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7047116B2 | Electric drive control apparatus, electric drive control method and program therefor | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5182596A | Device for measuring surface potentials at photosensitive body and electrostatic recording apparatus using said device | Physics | 7 | Expired |
| US5978324A | Disc recording/reproducing unit elastically supported on a main body of the apparatus including a lock mechanism for the elastic support device | Physics | 7 | Expired |
| US5405691A | Coating agents | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5225744A | Power unit for electric cars | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5828633A | Disc recording and/or reproducing changer with disc transporting mechanism and disc detector | Physics | 5 | Expired |
| US4254705A | Printing magnet drive device | Performing Operations; Transporting | 4 | Expired |
| US10202042B2 | Electric vehicle power conversion system | Emerging Cross-Sectional Technologies | 3 | Active |
| US7090956B2 | Image forming method and image forming apparatus | Physics | 3 | Expired |
| US10871092B2 | Blow-by gas treatment device for internal combustion engine | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US5501904A | Coating agents | Emerging Cross-Sectional Technologies | 1 | Expired |
| US10046646B2 | Power conversion system for electric vehicles | Emerging Cross-Sectional Technologies | 1 | Active |
| US11598232B2 | PCV valve coupling structure | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10012190B2 | Pump cover | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.