Toshifumi Watanabe
57Patents
10h-index
78Co-inventors
81Inventor score
Filing activity: Jul 11, 1991 → Oct 19, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6795496B1 | Jitter measuring device and method | Physics | 77 | Expired |
| US6911678B2 | Glass-sealed light-emitting diode | Electricity | 47 | Expired |
| US6522122B2 | Jitter measuring device and method | Electricity | 32 | Expired |
| US5822079A | Digital image forming apparatus with test image optimization | Physics | 22 | Expired |
| US5891895A | Hydroxypyridine derivatives their production and use | Chemistry; Metallurgy | 22 | Expired |
| US5978615A | Tandem-type image forming apparatus and image forming condition determination method used in this tandem-type image forming apparatus | Physics | 20 | Expired |
| US6687629B1 | Apparatus for and method of measuring a jitter | Physics | 20 | Expired |
| US5694223A | Digital image forming apparatus which specifies a sensitivity characteristic of a photoconductor | Physics | 19 | Expired |
| US6775321B1 | Apparatus for and method of measuring a jitter | Physics | 12 | Expired |
| US5581221A | Electrophotographic image forming apparatus | Physics | 11 | Expired |
| US6021288A | Image forming apparatus | Physics | 10 | Expired |
| US7076135B2 | Optical module and manufacturing method therefor | Physics | 10 | Expired |
| US5270308A | 1,3-benzoxazine derivatives, their production and use | Chemistry; Metallurgy | 10 | Expired |
| US6525523B1 | Jitter measurement apparatus and its method | Physics | 9 | Expired |
| US6285839A | Image forming apparatus having function for automatically adjusting image forming condition | Physics | 8 | Expired |
| US5364684A | Magnetic recording medium comprising a polyethylene-2,6-naphthalate multilayered film coated on both sides by a coating layer | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5555318A | Thresholding method for segmenting gray scale image, method for determining background concentration distribution, and image displacement detection method | Physics | 6 | Expired |
| US10907268B2 | Method for producing multi-layer bus bar unit | Electricity | 5 | Active |
| US6249656A | Image forming apparatus that reduces test toner cleaning | Physics | 5 | Expired |
| US5860041A | Device for measuring toner concentration in developer comprising toner and carrier | Physics | 5 | Expired |
| US5716971A | Pyridine derivatives, their production and use | Chemistry; Metallurgy | 4 | Expired |
| US5708918A | Image formation apparatus that can maintain appropriately toner density in developing device | Physics | 4 | Expired |
| US6147051A | Methods and compositions for the prophylactic and/or therapeutic treatment of organ hypofunction | Human Necessities | 2 | Expired |
| US5753619A | Composition for prophylaxis or treatment of pulmonary circulatory diseases | Human Necessities | 2 | Expired |
| US9399274B2 | Wafer polishing method | Electricity | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.