Hirohide Tanikawa
71Patents
27h-index
64Co-inventors
91Inventor score
Filing activity: Sep 15, 1986 → Feb 6, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5202213A | Developer with surface treated silicic acid for developing electrostatic image | Physics | 74 | Expired |
| US7611813B2 | Toner and image forming method | Physics | 58 | Active |
| US7288348B2 | Color toner | Physics | 56 | Expired |
| US7279262B2 | Magnetic carrier and two-component developer | Physics | 56 | Expired |
| US5968701A | Toner and image forming method | Physics | 56 | Expired |
| US7396626B2 | Toner | Physics | 55 | Active |
| US8142972B2 | Developer for replenishment and image forming method | Physics | 52 | Active |
| US6203959A | Toner | Physics | 51 | Expired |
| US4985327A | Non-magnetic toner | Emerging Cross-Sectional Technologies | 50 | Expired |
| US6235441A | Positively chargeable toner, image forming method and image forming apparatus | Physics | 47 | Expired |
| US6156471A | Toner and image forming method | Physics | 44 | Expired |
| US5014089A | Developer in an image forming device having a binding resin and magnetic powder | Emerging Cross-Sectional Technologies | 43 | Expired |
| US6653036B1 | Magnetic toner and image forming method | Physics | 40 | Expired |
| US4957840A | Developer and image forming device | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5707770A | Toner for developing electrostatic images, two component type developer, developing method, image forming method, heat fixing method, and process for producing toner | Physics | 38 | Expired |
| US6875549B2 | Dry toner, toner production process, image forming method and process cartridge | Physics | 37 | Expired |
| US5009973A | Image forming method and image forming apparatus | Physics | 35 | Expired |
| US6020102A | Positive-chargeable toner, image forming method and apparatus unit | Physics | 33 | Expired |
| US7442478B2 | Toner and method for forming image | Physics | 33 | Active |
| US6881527B2 | Toner, and process cartridge | Physics | 33 | Expired |
| US6120961A | Toner for developing electrostatic images | Physics | 33 | Expired |
| US5364722A | Toner for developing electrostatic image and heat-fixing method comprising a hydrocarbon wax | Emerging Cross-Sectional Technologies | 32 | Expired |
| US7138213B2 | Cyan toner and method for forming an image | Physics | 31 | Expired |
| US4737432A | Positively chargeable toner and developer for developing electrostatic images contains di-organo tin borate charge controller | Physics | 30 | Expired |
| US5202731A | Image forming apparatus having an alternating bias electric field | Physics | 28 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.