Nobuto Yokokawa
25Patents
13h-index
50Co-inventors
80Inventor score
Filing activity: Jan 26, 1995 → Aug 10, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5915155A | Toner replenishing and developer replacing device for a developing unit of an image forming apparatus | Physics | 79 | Expired |
| US6125243A | Toner replenishing and developer replacing device for a developing unit of an image forming apparatus | Physics | 61 | Expired |
| US5999773A | Image forming apparatus and cleaning method for contact-charging member | Physics | 55 | Expired |
| US5638159A | Developing unit for an image forming apparatus and method of collecting bicomponent developer therefrom | Physics | 47 | Expired |
| US6295438A | Method and apparatus for forming an image capable of supplying a proper amount of a lubricant to each image forming section | Physics | 44 | Expired |
| US5774772A | Toner cartridge having a toner stirring member | Physics | 44 | Expired |
| US5606408A | Image forming apparatus and cleaning device therefor | Physics | 42 | 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 |
| US5619316A | Image forming apparatus | Physics | 30 | Expired |
| US6949896B2 | Apparatus for and method of driving motor to move object at a constant velocity | Physics | 29 | Expired |
| US7376375B2 | Belt-drive control device, color-shift detecting method, color-shift detecting device, and image forming apparatus | Physics | 26 | Active |
| US7386262B2 | Belt driving control apparatus and image forming apparatus which uses a moving average process and a revolution average process | Physics | 21 | Expired |
| US7251444B2 | Apparatus for controlling driving of endless belt, and image forming apparatus | Physics | 14 | Expired |
| US7454150B2 | Image forming apparatus having a resist rotary member | Physics | 11 | Active |
| US7110700B2 | Belt driving controller, process cartridge, and image forming apparatus | Physics | 10 | Expired |
| US7257339B2 | Method and apparatus for image forming capable of effectively reducing unevenness of density and color displacement of images | Physics | 10 | Expired |
| US7509074B2 | Method and apparatus for image forming capable of effectively reducing unevenness of density and color displacement of images | Physics | 9 | Active |
| US7330009B2 | Method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing motor oscillation | Electricity | 8 | Expired |
| US7627268B2 | Image forming apparatus capable of providing a stable belt movement in a belt unit | Physics | 8 | Active |
| US7373093B2 | Apparatus and method for color image forming, and computer program product for driver controller | Physics | 7 | Expired |
| US7933546B2 | Lubricant applying device and image forming apparatus | Physics | 7 | Active |
| US7609998B2 | Transfer unit and image forming apparatus | Physics | 5 | Active |
| US8219000B2 | Image forming apparatus capable of effectively performing a maintenance operation | Physics | 3 | Active |
| US7800335B2 | Method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing motor oscillation | Electricity | 2 | Active |
| US8843009B2 | Image forming apparatus having a transfer member mount accommodating multiple different sizes of transfer members | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.