Osamu Sakai
76Patents
14h-index
129Co-inventors
87Inventor score
Filing activity: Nov 6, 1981 → Mar 7, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5208782A | Semiconductor integrated circuit device having a plurality of memory blocks and a lead on chip (LOC) arrangement | Electricity | 83 | Expired |
| US5518530A | Connected body comprising a gas separator and a metal, and apparatus for separating hydrogen gas from a mixed gas | Performing Operations; Transporting | 73 | Expired |
| US4703453A | Semiconductor memory with an improved dummy cell arrangement and with a built-in error correcting code circuit | Physics | 63 | Expired |
| US5614001A | Hydrogen separator, hydrogen separating apparatus and method for manufacturing hydrogen separator | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5674301A | Hydrogen preparing apparatus | Emerging Cross-Sectional Technologies | 51 | Expired |
| US6142096A | Electronic device manufacturing apparatus and method for manufacturing electronic device | Chemistry; Metallurgy | 33 | Expired |
| US4817052A | Semiconductor memory with an improved dummy cell arrangement and with a built-in error correcting code circuit | Physics | 20 | Expired |
| US5177743A | Semiconductor memory | Physics | 18 | Expired |
| US7005205B1 | Polymer electrolyte fuel cell | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5433888A | Phosphor composition, phosphor-coating composition, discharge lamp and preparation method thereof | Chemistry; Metallurgy | 17 | Expired |
| US5523018A | Phosphor composition, phosphor-coating composition, discharge lamp, and preparation method thereof | Chemistry; Metallurgy | 16 | Expired |
| US5958091A | Hydrogen preparing apparatus | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6779482B2 | Plasma deposition device for forming thin film | Electricity | 15 | Expired |
| US6746793B1 | Polymer electrolyte fuel cell | Emerging Cross-Sectional Technologies | 15 | Expired |
| US7150934B2 | Electrolyte film electrode union, fuel cell containing the same and process for producing them | Emerging Cross-Sectional Technologies | 14 | Expired |
| US7090705B2 | Electronic device, production method thereof, and plasma process apparatus | Electricity | 14 | Expired |
| US7708812B2 | Hydrogen gas separator fixing structure and hydrogen gas separating device using the same | Emerging Cross-Sectional Technologies | 12 | Active |
| US6665118B2 | Rear-projection screen and rear-projection image display | Physics | 10 | Expired |
| US6818339B1 | Polymer electrolyte type fuel cell | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6541144B2 | Fuel cell system | Emerging Cross-Sectional Technologies | 8 | Expired |
| US7314360B2 | Stretch rod extending device and bottom mold lifting device for stretch blow molding machine | Performing Operations; Transporting | 8 | Expired |
| US6638655B2 | Fuel cell system | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6881510B1 | Method for resorting characteristics of polymer electrolyte fuel cell | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6660424B1 | Fuel cell and method of manufacture thereof | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6991870B2 | Gas diffusion electrode and fuel cell using this | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.