Christopher W. Springfield
6Patents
3h-index
4Co-inventors
46Inventor score
Filing activity: Apr 19, 1999 → Jul 17, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7046794B2 | Double talk activity detector and method for an echo canceler circuit | Electricity | 40 | Expired |
| US6618701B2 | Method and system for noise suppression using external voice activity detection | Physics | 29 | Expired |
| US6799062B1 | Full-duplex hands-free transparency circuit and method therefor | Electricity | 19 | Expired |
| US7599483B2 | Echo canceler circuit and method | Electricity | 1 | Expired |
| US8238546B2 | Echo canceler circuit and method | Electricity | 0 | Active |
| US8811603B2 | Echo canceler circuit and method | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.