David Sheffield
6Patents
4h-index
6Co-inventors
50Inventor score
Filing activity: Dec 20, 1974 → Jan 27, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4275583A | Breakstem riveting tool with stem disposal device | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4275582A | Breakstem riveting tool with stem disposal device | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4368838A | Blind riveting machine | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4116036A | Hydraulically operated riveting apparatus | Emerging Cross-Sectional Technologies | 6 | Expired |
| US3970225A | Valve for a fluid dispenser | Human Necessities | 3 | Expired |
| US7575355B2 | Apparatus for illuminating channel letters and light boxes | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.