Keizo Kojima
11Patents
4h-index
16Co-inventors
57Inventor score
Filing activity: May 20, 1999 → Sep 14, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6183713A | Method for producing nitrogen trifluoride by gas-solid reaction | Chemistry; Metallurgy | 7 | Expired |
| US8891997B2 | Power supply system for stopping and starting operation in accordance with input voltage and image forming apparatus including the same | Emerging Cross-Sectional Technologies | 6 | Active |
| US10547244B2 | Power supply apparatus and image forming apparatus | Emerging Cross-Sectional Technologies | 5 | Active |
| US9274490B2 | Power supply apparatus and image forming apparatus | Electricity | 4 | Active |
| US11474458B2 | Image forming apparatus that determines whether or not plurality of rotating bodies are in state of contact | Physics | 1 | Active |
| US11258361B2 | Voltage detection apparatus and image forming apparatus | Electricity | 0 | Active |
| US11489974B2 | Image forming apparatus | Emerging Cross-Sectional Technologies | 0 | Active |
| US10459361B2 | Image forming apparatus with voltage adjustment member | Physics | 0 | Active |
| US9300216B2 | Switching power supply and image forming apparatus equipped with switching power supply | Emerging Cross-Sectional Technologies | 0 | Active |
| US11112735B2 | Image forming apparatus | Physics | 0 | Active |
| US11722606B2 | Image forming apparatus | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.