Naoyuki Okumura
20Patents
8h-index
29Co-inventors
75Inventor score
Filing activity: Nov 9, 1987 → May 18, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5861729A | Charger for portable terminal equipment having on-hook/off-hook detecting means and battery identifying means | Electricity | 34 | Expired |
| US4882644A | Magnetic head supporting mechanism | Physics | 32 | Expired |
| US5583717A | Information recording/reproducing device with a clamping mechanism having a collet assembly providing a reduced profile height | Physics | 21 | Expired |
| US6185380A | Image forming apparatus having independent recording media discharge passages | Physics | 14 | Expired |
| US6078760A | Image forming apparatus having an inverse and re-fixing sub-mode | Physics | 13 | Expired |
| US6459877B1 | Fixing device which prevents damage to a fixing belt | Physics | 11 | Expired |
| US6505028B1 | Image forming apparatus and fixing device for use with the same | Physics | 10 | Expired |
| US6574449B2 | Image forming apparatus, and fixing device for use with the same | Physics | 8 | Expired |
| US5600513A | Position detecting mechanisms for recording media | Physics | 6 | Expired |
| US5987294A | Toner fixing apparatus | Physics | 6 | Expired |
| US7149463B2 | Fixing device | Physics | 6 | Expired |
| US7024124B2 | Image forming apparatus which detects jam and jam detecting method for the same | Physics | 3 | Expired |
| US6792236B2 | Fixing device for an image forming apparatus | Physics | 3 | Expired |
| US7092665B2 | Fixing apparatus having an exfoliating member and a restricting member | Physics | 1 | Expired |
| US8926064B2 | Image recording device | Performing Operations; Transporting | 1 | Active |
| US9067418B2 | Image recording device | Performing Operations; Transporting | 0 | Active |
| US9539826B2 | Recording medium detection device and image recording apparatus | Performing Operations; Transporting | 0 | Active |
| US7187896B2 | Fixing device | Physics | 0 | Active |
| US10059125B2 | Recording appartus with support unit supporting medium transport belt | Performing Operations; Transporting | 0 | Active |
| US11390095B2 | Printing apparatus and method of positioning ultraviolet irradiation part | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.