Hitoshi Hamada
21Patents
7h-index
47Co-inventors
69Inventor score
Filing activity: Jun 23, 1978 → Oct 23, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD255174S | Sole | General | 66 | Expired |
| US6245453A | Fuel cell and separator for the same | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5473426A | Defect inspection apparatus | Physics | 25 | Expired |
| US8921000B2 | Fuel cell | Emerging Cross-Sectional Technologies | 18 | Active |
| US6277511A | Fuel cell | Emerging Cross-Sectional Technologies | 16 | Expired |
| US7138200B1 | Fuel cell and separator for the same | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6444338B1 | Fuel cell system with improved startability | Emerging Cross-Sectional Technologies | 9 | Expired |
| US9520612B2 | Fuel cell | Emerging Cross-Sectional Technologies | 2 | Active |
| US9570768B2 | Fuel cell system and control method thereof | Emerging Cross-Sectional Technologies | 2 | Active |
| US8415063B2 | Fuel cell system | Emerging Cross-Sectional Technologies | 1 | Active |
| US8877393B2 | Fuel cell | Emerging Cross-Sectional Technologies | 1 | Active |
| US10439247B2 | Fuel cell stack | Emerging Cross-Sectional Technologies | 1 | Active |
| US8455156B2 | Separator for fuel cell and fuel cell | Emerging Cross-Sectional Technologies | 1 | Active |
| US9118049B2 | Fuel cell system | Emerging Cross-Sectional Technologies | 0 | Active |
| US10522865B2 | Fuel cell stack | Emerging Cross-Sectional Technologies | 0 | Active |
| US9397349B2 | Fuel cell | Emerging Cross-Sectional Technologies | 0 | Active |
| US7572537B2 | Fuel cell and separator for the same | Emerging Cross-Sectional Technologies | 0 | Expired |
| US6769642B2 | Pinch roller and pinch roller apparatus | Performing Operations; Transporting | 0 | Expired |
| US11233252B2 | Fuel cell case | Emerging Cross-Sectional Technologies | 0 | Active |
| US10903513B2 | Fuel cell device and vehicle with the same mounted thereon | Emerging Cross-Sectional Technologies | 0 | Active |
| US10522846B2 | Fuel cell end plate with resin layer and protrusion | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.