Ippei Sawayama
9Patents
5h-index
20Co-inventors
59Inventor score
Filing activity: Jun 17, 1985 → Jan 27, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5428249A | Photovoltaic device with improved collector electrode | Emerging Cross-Sectional Technologies | 70 | Expired |
| US5863412A | Etching method and process for producing a semiconductor element using said etching method | Emerging Cross-Sectional Technologies | 49 | Expired |
| US6214636A | Photovoltaic device with improved collector electrode | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6051116A | Etching apparatus | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4926085A | Vibration wave motor | Electricity | 13 | Expired |
| US6491808B2 | Electrolytic etching method, method for producing photovoltaic element, and method for treating defect of photovoltaic element | Chemistry; Metallurgy | 5 | Expired |
| US6114185A | Welding process and photovoltaic device | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4709221A | Sheet coil | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6425325B1 | Offset printing method and offset printing apparatus | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.