Yuichi Obara
16Patents
6h-index
18Co-inventors
63Inventor score
Filing activity: Aug 7, 1986 → May 20, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4836636A | Optical switch and optical keyboard utilizing the same | Physics | 34 | Expired |
| US4846729A | Zero insertion force connector actuated by a stored shape member | Electricity | 30 | Expired |
| US4801191A | Connecting section for optical fiber cable | Physics | 24 | Expired |
| US8870182B2 | Sheet conveying apparatus and image forming apparatus | Emerging Cross-Sectional Technologies | 20 | Active |
| US5059133A | Zero insertion force connector actuated by a stored shape member | Electricity | 14 | Expired |
| US9027920B2 | Sheet stacking apparatus, sheet feeding apparatus, and image forming apparatus | Performing Operations; Transporting | 8 | Active |
| US4952162A | Zero insertion force connector actuated by a stored shape member | Electricity | 6 | Expired |
| US5233177A | Optical sensor with fiberless optical member | Electricity | 5 | Expired |
| US9428353B2 | Image forming apparatus | Physics | 3 | Active |
| US8690150B2 | Sheet feed device and image forming apparatus with rotation stacking portion | Performing Operations; Transporting | 3 | Active |
| US9815640B2 | Image forming apparatus | Physics | 2 | Active |
| US10737898B2 | Sheet discharge apparatus and image forming apparatus including the same | Performing Operations; Transporting | 1 | Active |
| US11274007B2 | Sheet discharge apparatus and image forming apparatus including the same | Performing Operations; Transporting | 0 | Active |
| US10689219B2 | Sheet discharge apparatus and image forming apparatus including the same | General | 0 | Revoked |
| US9977389B2 | Sheet stacking apparatus and image forming apparatus | Performing Operations; Transporting | 0 | Active |
| US10221033B2 | Sheet discharge apparatus and image forming apparatus including the same | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.