David E. Johnstone
8Patents
5h-index
22Co-inventors
59Inventor score
Filing activity: Aug 31, 2000 → Jun 15, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7627531B2 | System for facilitating a transaction | Physics | 367 | Expired |
| US7835960B2 | System for facilitating a transaction | Physics | 298 | Expired |
| US7343351B1 | Methods and apparatus for conducting electronic transactions | Physics | 221 | Expired |
| US7801827B2 | Methods and apparatus for conducting electronic transactions | Physics | 68 | Expired |
| US8214299B2 | Methods and apparatus for conducting electronic transactions | Physics | 11 | Active |
| US8924310B2 | Methods and apparatus for conducting electronic transactions | Physics | 5 | Active |
| US8938402B2 | Methods and apparatus for conducting electronic transactions | Physics | 3 | Active |
| US9519894B2 | Methods and apparatus for conducting electronic transactions | Physics | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.