Ryuichi Kojima
26Patents
8h-index
27Co-inventors
75Inventor score
Filing activity: Aug 20, 1996 → Nov 3, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5927702A | Sheet feeder and image forming apparatus using the same | Performing Operations; Transporting | 73 | Expired |
| US6070867A | Sheet supplying apparatus | Performing Operations; Transporting | 44 | Expired |
| US6328421A | Fluid drop projecting head using taper-shaped chamber for generating a converging surface wave | Performing Operations; Transporting | 31 | Expired |
| US6450615B2 | Ink jet printing apparatus and method using a pressure generating device to induce surface waves in an ink meniscus | Performing Operations; Transporting | 28 | Expired |
| US6375183B1 | Sheet feeding apparatus with inclined separation plane, and image forming apparatus having same | Performing Operations; Transporting | 27 | Expired |
| US6308947A | Sheet feeding apparatus | Performing Operations; Transporting | 23 | Expired |
| US6502816B2 | Sheet feeding apparatus and image forming apparatus having same | Performing Operations; Transporting | 23 | Expired |
| US6196664A | Ink droplet eject apparatus and method | Performing Operations; Transporting | 12 | Expired |
| US9152097B2 | Fixing apparatus | Physics | 5 | Active |
| US6769680B2 | Sheet feeding apparatus and image forming apparatus equipped therewith | Performing Operations; Transporting | 5 | Expired |
| US6921149B2 | Liquid drop discharging head and liquid drop discharging device | Performing Operations; Transporting | 3 | Expired |
| US7242878B2 | Image forming apparatus and management system | Physics | 3 | Expired |
| US7192118B2 | Droplet ejecting head and droplet ejecting apparatus | Performing Operations; Transporting | 3 | Expired |
| US8301055B2 | Image forming apparatus with air cooling of sheets through multiple ducts | Physics | 2 | Active |
| US7980542B2 | Sheet processing apparatus and image forming apparatus | Physics | 2 | Active |
| US6439685B1 | Printing apparatus and method thereof | Performing Operations; Transporting | 2 | Expired |
| US7758032B2 | Sheet processing apparatus and image forming apparatus | Physics | 2 | Active |
| US7349639B2 | Image forming apparatus and management system | Physics | 1 | Active |
| US8520265B2 | Engraving processing apparatus and image forming apparatus | Performing Operations; Transporting | 0 | Active |
| US12117767B1 | Image forming apparatus having plural dividing plates in a duct for guiding air | Electricity | 0 | Active |
| US11526128B2 | Image forming apparatus having duct with flow dividing plates | Physics | 0 | Active |
| US6719391B2 | Ink jet recording apparatus and ink jet recording method | Physics | 0 | Expired |
| US7403740B2 | Sheet feeding unit and image forming apparatus | Physics | 0 | Active |
| US9588475B2 | Sheet transport apparatus and image forming apparatus | Performing Operations; Transporting | 0 | Active |
| US7277668B2 | Sheet feeding unit and image forming apparatus | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.