Hideki Okada
117Patents
9h-index
142Co-inventors
83Inventor score
Filing activity: Jan 27, 1981 → Jul 12, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5655197A | Developing device | Physics | 32 | Expired |
| US5475469A | Image forming equipment with depletion detection in an toner endless circulation path | Physics | 22 | Expired |
| US7495538B2 | Inductor using drum core and method for producing the same | Emerging Cross-Sectional Technologies | 21 | Active |
| US5557060A | Developing device | Physics | 17 | Expired |
| US8173839B2 | 5-aminolevulinic acid salt, process for producing the same and use thereof | Chemistry; Metallurgy | 15 | Active |
| US6146802A | Toner and development unit and image forming apparatus using the same | Physics | 13 | Expired |
| US8950650B2 | Friction stir spot welding device and friction stir spot welding method | Performing Operations; Transporting | 10 | Active |
| USD300533S | Combined computer display terminal and telephone | General | 10 | Expired |
| US9095926B2 | Friction stir spot welding device and friction stir spot welding method | Performing Operations; Transporting | 9 | Active |
| US6820317B2 | Method of making a metallic bellows | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6564606B2 | Manufacturing method and manufacturing apparatus for metallic bellows | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8308150B2 | Coil spring for vehicle suspension and method for manufacturing the same | Emerging Cross-Sectional Technologies | 7 | Active |
| US8533954B2 | Method for manufacturing a coil spring for vehicle suspension | Emerging Cross-Sectional Technologies | 6 | Active |
| US8607605B2 | Manufacturing method for coil spring | Emerging Cross-Sectional Technologies | 6 | Active |
| US10201873B2 | Friction stir spot welding device and friction stir spot welding method | Performing Operations; Transporting | 6 | Active |
| US7149463B2 | Fixing device | Physics | 6 | Expired |
| USD300744S | Combined computer display terminal and telephone | General | 6 | Expired |
| US9302343B2 | Process for spot-joining stacked metal foils | Performing Operations; Transporting | 6 | Active |
| US10415110B2 | Method for producing hollow stabilizer | Performing Operations; Transporting | 5 | Active |
| US7601625B2 | Method for manufacturing semiconductor device having solder layer | Electricity | 5 | Expired |
| US6358654B1 | Toner and development unit and image forming apparatus using the same | Physics | 4 | Expired |
| US10919108B2 | Configured to set the plunging force | Performing Operations; Transporting | 4 | Active |
| US5977389A | Naphthoquinone derivative | Physics | 4 | Expired |
| US6383698B1 | Electrophotosensitive material using quinone derivative | Physics | 4 | Expired |
| US7399372B2 | Method for manufacturing metallic bellows | Mechanical Engineering; Lighting; Heating | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.