Makoto Obu
46Patents
22h-index
86Co-inventors
88Inventor score
Filing activity: Jul 27, 1983 → Feb 5, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4930438A | Developing device using a single component developer | Physics | 57 | Expired |
| US4760422A | Developing device using single component toner | Physics | 56 | Expired |
| US5923930A | Apparatus for controlling density of liquid developing solution and apparatus for forming images | Physics | 55 | Expired |
| US5208612A | Image recording apparatus constituting of selectable units | Physics | 53 | Expired |
| US5848329A | Image forming apparatus having a mounting/dismounting mechanism | Physics | 51 | Expired |
| US6347212B1 | Image forming apparatus having improved image carrier cleaning | Physics | 50 | Expired |
| US6324374A | Belt device and unit device including belt device and image forming apparatus using the belt device and unit device | Physics | 50 | Expired |
| US6308027A | Image forming apparatus having a common sheet processing station | Physics | 47 | Expired |
| US5754202A | Ink jet recording apparatus | Performing Operations; Transporting | 44 | Expired |
| US6292305A | Virtual screen display device | Physics | 43 | Expired |
| US6597884B2 | Image forming apparatus including electrostatic conveyance of charged toner | Physics | 41 | Expired |
| US5493365A | Operating section for an image forming apparatus | Physics | 40 | Expired |
| US5235384A | Image forming apparatus with replaceable process units | Physics | 39 | Expired |
| US6108508A | Image forming apparatus using wet type developing device | Physics | 39 | Expired |
| US5666616A | Wet-type image forming apparatus for forming a condensed toner image | Physics | 38 | Expired |
| US5953559A | Device and method for forming full-color images | Physics | 37 | Expired |
| US4696255A | Developing apparatus | Physics | 35 | Expired |
| US5987281A | Image forming apparatus | Physics | 34 | Expired |
| US6571071B2 | Consumption information management apparatus, image formation apparatus, and consumption information management system | Electricity | 34 | Expired |
| US5652080A | Methods and apparatus to duplicate images on various image carrying media using liquid carrier based developer | Physics | 30 | Expired |
| US5610725A | Communication system for managing data of resources of image forming unit | Electricity | 30 | Expired |
| US5987282A | Image forming apparatus with a developing device using a developing liquid | Physics | 25 | Expired |
| US5864737A | Image forming device which forms an electric field to discharge an object | Physics | 21 | Expired |
| US6556802B2 | Belt device and unit device including belt device and image forming apparatus using the belt device and unit device | Physics | 21 | Expired |
| US7203452B2 | Tandem image forming device having a side-by-side arrangement of image forming sections | Physics | 21 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.