Hiroyoshi Haga
33Patents
6h-index
31Co-inventors
69Inventor score
Filing activity: Aug 23, 1989 → Jul 13, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5991570A | Image forming apparatus having a protection unit to protect a sensitive image forming element which is exposed when an open/close member is open | Physics | 43 | Expired |
| US5483330A | Image transfer unit of image formation apparatus | Physics | 35 | Expired |
| US5029840A | Automatic sheet feeder for an image recording apparatus | Performing Operations; Transporting | 21 | Expired |
| US7277657B2 | Cleaning device and image forming apparatus including the cleaning device that controls occurrences of background fouling and abnormal image | Physics | 15 | Expired |
| US8270856B2 | Apparatus including a re-transfer unit to re-transfer a recording medium and method of image forming | Physics | 13 | Active |
| US8891996B2 | Power supply module and image forming apparatus including same | Physics | 6 | Active |
| US8682231B2 | Image forming apparatus | Physics | 5 | Active |
| US9632461B2 | Image forming apparatus controlling transfer bias based on temperature and humidity | Physics | 2 | Active |
| US9395658B2 | Image forming apparatus | Physics | 2 | Active |
| US9864307B2 | Image forming apparatus with a controller to set transfer bias | Physics | 2 | Active |
| US8929786B2 | Image forming apparatus, system, and method using a superimposed voltage signal and a direct voltage signal | Physics | 1 | Active |
| US9835987B2 | Image forming apparatus and transfer bias control | Physics | 1 | Active |
| US9817341B2 | Image forming apparatus | Physics | 1 | Active |
| US9645530B2 | Image forming apparatus | Physics | 1 | Active |
| US8824941B2 | Image transfer device and image forming apparatus incorporating same | Physics | 1 | Active |
| US8977153B2 | Image forming apparatus which uses an AC voltage and/or a DC voltage at a transfer nip depending on a surface roughness of a recording sheet | Physics | 1 | Active |
| US9740156B2 | Image forming apparatus that adjusts a transfer bias according to surface properties of a transfer target | Physics | 1 | Active |
| US8805223B2 | Image forming apparatus, image forming system, and transfer method | Physics | 1 | Active |
| US9459564B2 | Image forming apparatus | Physics | 1 | Active |
| US8948644B2 | Power supply module and image forming apparatus including same | Physics | 0 | Active |
| US9075383B2 | Image forming apparatus | Physics | 0 | Active |
| US9811036B2 | Belt device and image forming apparatus including same | Physics | 0 | Active |
| US11054762B2 | Powder container, process cartridge, and image forming apparatus | Physics | 0 | Active |
| US9519257B2 | Cleaning device and image forming apparatus incorporating same | Physics | 0 | Active |
| US9696662B2 | Cleaning device and image forming apparatus incorporating same | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.