Takeshi Ukai
15Patents
10h-index
26Co-inventors
72Inventor score
Filing activity: Jun 30, 1972 → Oct 9, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5751854A | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Electricity | 101 | Expired |
| US5604596A | Copying apparatus having determination unit for special original and for controlling copying and marking based on determination | Electricity | 66 | Expired |
| US6272248A | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Physics | 66 | Expired |
| US5659628A | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Electricity | 57 | Expired |
| US5652803A | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Electricity | 32 | Expired |
| US5444518A | Image forming apparatus which adds identification information to recorded images to prevent forgery | Electricity | 31 | Expired |
| US5642199A | Copier having a security function | Electricity | 23 | Expired |
| US3952242A | Automatic voltage regulator with optical feedback | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5696365A | Bar code recording device for a paper media system | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4509732A | Document handling apparatus for producing folded and bound stacks of documents | Performing Operations; Transporting | 11 | Expired |
| US5602939A | Specific document discriminating apparatus and image reading apparatus using it therein | Electricity | 9 | Expired |
| US6025603A | Specific document determining apparatus, image reading apparatus, specific document determining method, and a computer-readable recording medium with a program for execution of the method stored therein image reading apparatus having a specific document | Electricity | 4 | Expired |
| US7038228B2 | Image forming apparatus with specific document determining module and abnormality detection means | Electricity | 4 | Expired |
| US6949757B2 | Specific document determining apparatus including a microwave sensor | Electricity | 1 | Expired |
| US6696696B1 | Image forming apparatus with specific document module having a microwave sensor | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.