Tsukuru Kai
67Patents
22h-index
71Co-inventors
91Inventor score
Filing activity: Jul 6, 1990 → Feb 8, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6366751B1 | Image forming apparatus including preselected range between charge injection layer and voltage potential | Physics | 120 | Expired |
| US5915155A | Toner replenishing and developer replacing device for a developing unit of an image forming apparatus | Physics | 79 | Expired |
| US6505014B2 | Image forming apparatus and an image forming process unit | Physics | 72 | Expired |
| US5109254A | Developing apparatus | Emerging Cross-Sectional Technologies | 69 | Expired |
| US6125243A | Toner replenishing and developer replacing device for a developing unit of an image forming apparatus | Physics | 61 | Expired |
| US5416568A | Developing unit for an image forming apparatus | Physics | 54 | Expired |
| US6442364B2 | Image forming apparatus having a developer carrier capable of preventing toner adhesion | Physics | 48 | Expired |
| US5638159A | Developing unit for an image forming apparatus and method of collecting bicomponent developer therefrom | Physics | 47 | Expired |
| US5774772A | Toner cartridge having a toner stirring member | Physics | 44 | Expired |
| US6721516B2 | Image forming apparatus | Physics | 43 | Expired |
| US5606408A | Image forming apparatus and cleaning device therefor | Physics | 42 | Expired |
| US6597884B2 | Image forming apparatus including electrostatic conveyance of charged toner | Physics | 41 | Expired |
| US5598254A | Cartridge for replenishing two-ingredient developer to an image forming apparatus and a replenishing device using the same | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5235384A | Image forming apparatus with replaceable process units | Physics | 39 | Expired |
| US6658227B2 | Development method apparatus, image formation and process cartridge for suppressing variation in toner charge | Physics | 33 | Expired |
| US5619316A | Image forming apparatus | Physics | 30 | Expired |
| US6671484B2 | Image forming apparatus having developing device with magnet roller with particular magnetic flux density | Physics | 29 | Expired |
| US5367363A | Image forming apparatus having rotatable electrophotographic process unit | Physics | 28 | Expired |
| US6757509B2 | Image forming apparatus | Physics | 28 | Expired |
| US6819892B2 | Electrophotographic image forming apparatus including air conditioning means for removing harmful substances | Physics | 26 | Expired |
| US6597885B2 | Image forming apparatus having a developing device with a magnet brush | Physics | 24 | Expired |
| US6081684A | Method and apparatus for image forming capable of performing an improved circulation of developer | Physics | 23 | Expired |
| US6385423B1 | Image forming apparatus and developing device therefor capable of increasing image density of a low contrast image | Physics | 22 | Expired |
| US6757511B2 | Image forming apparatus and method using a magnetic toner brush | Physics | 22 | Expired |
| US6449452B1 | Method and apparatus for image developing capable of using developer in a magnet brush form | Physics | 22 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.