Naoki Iwata
41Patents
15h-index
64Co-inventors
84Inventor score
Filing activity: Apr 9, 1991 → Sep 22, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5339141A | Developing device with a developer carrier capable of forming numerous microfields thereon | Physics | 66 | Expired |
| US5424814A | Developing device with microfields formed on developer carrier | Physics | 50 | Expired |
| US5245391A | Developing device having surface microfields for an image forming apparatus | Physics | 45 | Expired |
| US5502552A | Developing device for an image forming apparatus | Physics | 41 | Expired |
| US5220383A | Developing device for an image forming apparatus having a large number of microfields formed on a developer carrier | Physics | 35 | Expired |
| US5311263A | Developing apparatus for image forming equipment using developer carrier for forming microfields | Physics | 35 | Expired |
| US5239344A | Developing roller having insulating and conductive areas | Physics | 34 | Expired |
| US5741616A | Method of developing latent electrostatic images and developer-bearing member | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5172169A | Developer carrier of a developing device and a method of producing the same | Physics | 29 | Expired |
| US5812917A | Developing apparatus | Physics | 28 | Expired |
| US5474869A | Toner and method of developing | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5541029A | Multicolor image forming method preventing mixing of colors | Physics | 25 | Expired |
| US5809386A | Developing device for an image forming apparatus | Physics | 24 | Expired |
| US5286918A | Developing apparatus using a developer carrier capable of forming microfields on the surface thereof | Physics | 22 | Expired |
| US5451713A | Developing apparatus using a developer carrier capable of forming microfields | Physics | 17 | Expired |
| US7352987B2 | Fixing device and image forming apparatus for holding a recording medium by electrostatic force | Physics | 15 | Expired |
| US5450172A | Nondestructive multicolor image forming apparatus | Physics | 15 | Expired |
| US5869213A | Multicolor image forming method preventing contamination of toner on an image carrier with toner on a developing carrier | Physics | 15 | Expired |
| US5315061A | Developing apparatus using a developer carrier capable of forming microfields | Physics | 15 | Expired |
| US5557392A | Multicolor image forming apparatus with pulse voltage and DC voltage applied to a developing unit | Physics | 14 | Expired |
| US5674408A | Developer carrier capable of forming microfields thereon and method of producing the same | Physics | 14 | Expired |
| US5241357A | Color image forming equipment with two developers and a pulse bias | Physics | 12 | Expired |
| US7046949B2 | Image fixing apparatus using pulsating power for heating | Physics | 8 | Expired |
| US7590376B2 | Fixing method, a fixing apparatus, an image formation method, and an image formation apparatus | Physics | 7 | Active |
| US6983117B2 | Image forming apparatus configured for double sided printing | Physics | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.