Sadao Takahashi
73Patents
18h-index
121Co-inventors
87Inventor score
Filing activity: Jul 21, 1975 → Sep 11, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5585896A | Image forming apparatus with a contact member contacting an image carrier | Physics | 302 | Expired |
| US5911004A | Image processing apparatus for discriminating image characteristics using image signal information obtained in an image scanning operation | Electricity | 73 | Expired |
| US5394231A | Image forming apparatus capable of forming an erasable image | Physics | 65 | Expired |
| US7489415B2 | Document processing system | Physics | 63 | Active |
| US5825937A | Spatial-filtering unit for performing adaptive edge-enhancement process | Physics | 42 | Expired |
| US4634264A | Photosensitive member of recording apparatus | Physics | 41 | Expired |
| US6651894B2 | Imaging method, imaging apparatus, and image information management system | Physics | 41 | Expired |
| US4791454A | Removable photoconductive element unit for image-forming apparatus | Physics | 36 | Expired |
| US6744916B1 | Image processing apparatus and method for interpolating missing pixels | Electricity | 34 | Expired |
| US5574538A | Method and apparatus for removing image forming substance from image holding member forming processing situation mark | Physics | 30 | Expired |
| US8825682B2 | Architecture for mixed media reality retrieval of locations and registration of images | Electricity | 30 | Active |
| US5557373A | Cleaning system for charging drum of an image forming apparatus | Physics | 25 | Expired |
| US4404620A | Luminaire | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US5572293A | Method of and system for cleaning a charge inducing member | Physics | 24 | Expired |
| USD286541S | Photoconductor unit for copying machine | General | 23 | Expired |
| US6898329B1 | Image binarization apparatus, image binarization method, image pickup apparatus, image pickup method, and a computer product | Physics | 23 | Expired |
| USRE37645E1 | Method and apparatus for removing image forming substance from image holding member forming processing situation mark | General | 20 | Expired |
| US6634559B2 | Data sheet and information management system using data sheet | Physics | 19 | Expired |
| US5605777A | Method and apparatus for regenerating image holding member | Physics | 18 | Expired |
| US4163201A | Elastic surface wave device | Electricity | 18 | Expired |
| US5610691A | Image forming apparatus having a contact charging member and a cleaning member | Physics | 16 | Expired |
| US4746467A | Process for producing microcapsules | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5805954A | Image forming apparatus that detects environmental conditions | Physics | 14 | Expired |
| US4563076A | Imaging apparatus | Physics | 14 | Expired |
| US5547793A | Method for using image support regeneratively and tool for forming image on image support | Physics | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.