Kazuhiko Hirokawa
15Patents
3h-index
20Co-inventors
56Inventor score
Filing activity: Dec 21, 2007 → Jul 18, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7910733B2 | Image-forming material | Physics | 5 | Active |
| US9550902B1 | Aqueous ink, ink cartridge, ink drying system, ink drying method, recording apparatus, and recording method | Chemistry; Metallurgy | 3 | Active |
| US8120819B2 | Image processing device and image forming device for generating corrected image data for a source image according to absorption wavelength characteristics of invisible coloring material | Electricity | 3 | Active |
| US7679807B2 | Display medium, display device and display method | Physics | 1 | Active |
| US8017291B2 | Image-forming material | Emerging Cross-Sectional Technologies | 1 | Active |
| US7985291B2 | Perimidine-substituted squarylium dye, dispersion medium, detection medium and image forming material | Physics | 1 | Active |
| US7667047B2 | Colorant | Chemistry; Metallurgy | 1 | Active |
| US8676098B2 | Developing device and image forming apparatus | Physics | 1 | Active |
| US10407585B2 | Aqueous ink for ink jet recording, aqueous ink set for ink jet recording, and ink jet recording method | Chemistry; Metallurgy | 0 | Active |
| US9782976B2 | Liquid supply device and droplet ejecting apparatus | Performing Operations; Transporting | 0 | Active |
| US10494535B2 | Near-infrared absorbent dispersion, aqueous ink for ink jet recording, and aqueous ink set for ink jet recording | Chemistry; Metallurgy | 0 | Active |
| US8268523B2 | Black color material and toner | Physics | 0 | Active |
| US8343701B2 | Image forming material | Emerging Cross-Sectional Technologies | 0 | Active |
| US7951960B2 | Black color material and toner | Chemistry; Metallurgy | 0 | Active |
| US8007975B2 | Colorant and toner | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.