David Ritchie
3Patents
2h-index
5Co-inventors
41Inventor score
Filing activity: Apr 2, 1984 → Feb 16, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7952564B2 | Multiple-touch sensor | Physics | 22 | Active |
| US4565208A | Seismic shut-off valve | Emerging Cross-Sectional Technologies | 14 | Expired |
| USD287871S | Seismic gas shut-off valve | General | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.