Douglas Ritchie
6Patents
4h-index
2Co-inventors
47Inventor score
Filing activity: Jan 31, 1986 → Jun 24, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD322415S | Timepiece face | General | 32 | Expired |
| USD319399S | Mantel clock | General | 6 | Expired |
| US4693613A | Logo clock | Physics | 5 | Expired |
| USD302528S | Prism clock | General | 4 | Expired |
| US4674891A | Clock | Physics | 1 | Expired |
| US11056354B2 | Semiconductor separation device | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.