Tetsuro Hirota
35Patents
9h-index
67Co-inventors
78Inventor score
Filing activity: Apr 19, 1982 → Dec 15, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5818482A | Ink jet printing head | Performing Operations; Transporting | 79 | Expired |
| US5754202A | Ink jet recording apparatus | Performing Operations; Transporting | 44 | Expired |
| US6331052A | Ink jet printing apparatus | Performing Operations; Transporting | 32 | Expired |
| US6053597A | Ink jet recording apparatus and method for automatically changing recording operation mode when interchangeable recording head unit is replaced | Performing Operations; Transporting | 22 | Expired |
| US5821953A | Ink-jet head driving system | Performing Operations; Transporting | 21 | Expired |
| US4661822A | Ink jet printer | Performing Operations; Transporting | 15 | Expired |
| US4644372A | Ink jet printer | Performing Operations; Transporting | 14 | Expired |
| US7992953B2 | Image forming apparatus and method of correcting deviation of shooting position | Performing Operations; Transporting | 13 | Active |
| US4620249A | Apparatus for driving a floppy disc | Physics | 10 | Expired |
| US7914096B2 | Image forming apparatus, landing position shift correction method, and landing position shift correction sheet member | Performing Operations; Transporting | 9 | Active |
| US8186799B2 | Image forming apparatus and impact position displacement correction method | Performing Operations; Transporting | 4 | Active |
| US9817335B2 | Powder amount detector, powder supply device, and image forming apparatus incorporating same | Physics | 3 | Active |
| US6147766A | Printing apparatus for increasing efficiency in transmitting image data between internal control units | Physics | 3 | Expired |
| US9645538B2 | Developing device, and image forming apparatus and process cartridge incorporating same | Physics | 3 | Active |
| US8066348B2 | Image forming apparatus and defective nozzle detection method | Performing Operations; Transporting | 3 | Active |
| US8157342B2 | Liquid-jet device, image forming apparatus, and method for adjusting landing positions of liquid droplets | Performing Operations; Transporting | 3 | Active |
| US9523940B2 | Powder detector, developing device, process cartridge, image forming apparatus, and powder detecting method | Physics | 3 | Active |
| US9523664B2 | Powder detector, image forming apparatus including same, and powder detecting method | Physics | 2 | Active |
| US9158228B2 | Development device and image forming apparatus incorporating same | Physics | 2 | Active |
| US10228632B2 | Powder detection device, image forming apparatus, powder detection method, and non-transitory recording medium | Physics | 1 | Active |
| US8259142B2 | Image forming apparatus with developer passage amount control electrodes | Physics | 1 | Active |
| US9170233B2 | Magnetic permeability detector, developing device, image forming apparatus, and oscillation signal frequency calculation method therefor | Physics | 1 | Active |
| US8824935B2 | Development device, process cartridge incorporating same, and image forming apparatus incorporating same | Physics | 1 | Active |
| US10317814B2 | Powder supply device and image forming apparatus incorporating same | Physics | 0 | Active |
| US10031016B2 | Fluid detection apparatus to detect a quantity of fluid using a vibration | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.