Keiji Arai
15Patents
6h-index
41Co-inventors
66Inventor score
Filing activity: Jan 13, 1987 → Dec 20, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD333641S | Motorcycle | General | 28 | Expired |
| US6531661B2 | Multilayer printed circuit board and method of making the same | Electricity | 19 | Expired |
| US5287026A | Superconducting magnetic levitation apparatus | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4761581A | Magnetic wedge | Electricity | 14 | Expired |
| US4777396A | Rotor of induction motor | Electricity | 9 | Expired |
| US4763155A | Shutter control device for camera | Physics | 8 | Expired |
| US5538616A | Process for copper plating a wiring board | Electricity | 4 | Expired |
| US7377030B2 | Wiring board manufacturing method | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5448021A | Copper plating process and wiring board | Electricity | 3 | Expired |
| US6021833A | Manufacturing line for multi-layered printed circuit boards | Emerging Cross-Sectional Technologies | 1 | Expired |
| US10338489B2 | Two-component developer and image forming method using the same | Physics | 0 | Active |
| US10509338B2 | Two-component developer for developing electrostatic latent image | Physics | 0 | Active |
| US10698329B2 | Electrostatic image developer | Physics | 0 | Active |
| US7935891B2 | Wiring board manufacturing method | Emerging Cross-Sectional Technologies | 0 | Active |
| US12174584B2 | Electrostatic charge image developing toner | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.