David B. Joyce
8Patents
4h-index
8Co-inventors
50Inventor score
Filing activity: Mar 21, 1983 → Dec 9, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4472610A | Keyboards incorporating keys pivotable against biased detent means to operate electrical switches | Electricity | 12 | Expired |
| US6368403B1 | Method and apparatus for purifying silicon | Emerging Cross-Sectional Technologies | 11 | Expired |
| US9377912B2 | Mobile electronic device comprising a modified sapphire | Physics | 5 | Active |
| US8177910B2 | System and method for crystal growing | Emerging Cross-Sectional Technologies | 5 | Active |
| US7344596B2 | System and method for crystal growing | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8329133B2 | Method and apparatus for refining metallurgical grade silicon to produce solar grade silicon | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7918936B2 | System and method for crystal growing | Emerging Cross-Sectional Technologies | 2 | Active |
| US9546434B2 | High-temperature process improvements using helium under regulated pressure | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.