Keiji Nakatani
32Patents
14h-index
37Co-inventors
81Inventor score
Filing activity: Jan 5, 1978 → Dec 8, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5390003A | Copying system for preventing copying of copy-prohibited images | Electricity | 73 | Expired |
| US4821107A | Multi-functional imaging apparatus | Electricity | 73 | Expired |
| US4780806A | Control device for an apparatus | Physics | 33 | Expired |
| US5608547A | Image forming apparatus having illumination direction altered for every plurality of readout operations with respect to one original | Electricity | 32 | Expired |
| US4958221A | Digital color copying machine comprising a test mode for making a color adjustment | Electricity | 28 | Expired |
| US5583941A | Imaging processor | Electricity | 26 | Expired |
| US4806978A | Image editing system | Physics | 24 | Expired |
| US4979031A | Digital color copying machine | Electricity | 24 | Expired |
| US5410419A | Facsimile machine capable of distinguishing copied image and received image | Electricity | 22 | Expired |
| US5119182A | Image forming apparatus comprising sample image printing mode and image forming method therefor | Electricity | 17 | Expired |
| US5124799A | Digital color copying machine for forming a plurality of images of the same image | Electricity | 16 | Expired |
| US4978226A | Digital color copying machine for composing and controlling the color of a composed image | Electricity | 16 | Expired |
| US4806976A | Copy apparatus with pattern writing capability | Physics | 14 | Expired |
| US4742373A | Copying machine | Physics | 14 | Expired |
| US4816864A | Programmable copying apparatus | Physics | 14 | Expired |
| US4433906A | Microfilm reader printer equipped with improved exposure amount control arrangement | Physics | 13 | Expired |
| US5699169A | Image forming apparatus wherein data is converted between multi-level data and bi-level data | Electricity | 10 | Expired |
| US4207473A | Frame detection circuitry for microfilm reader apparatus | Physics | 10 | Expired |
| US5182638A | Digital color copying machine comprising a test mode for making a color adjustment | Electricity | 9 | Expired |
| US4967287A | Image forming apparatus | Electricity | 9 | Expired |
| US4864364A | Charge eraser for an electrophotographic copier | Physics | 7 | Expired |
| US4457008A | Automatic retrieval apparatus | Physics | 5 | Expired |
| US5124788A | Digital color copying machine comprising a test mode for making a color adjustment | Electricity | 5 | Expired |
| US4916486A | Copying and printing apparatus | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4524315A | Roll film carrier used in reader or reader printer | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.