Keith A. Pirkl
8Patents
8h-index
9Co-inventors
54Inventor score
Filing activity: Mar 14, 1997 → May 2, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5889774A | Method and apparatus for selecting an internet/PSTN changeover server for a packet based phone call | Electricity | 306 | Expired |
| US6026087A | Method and apparatus for establishing a voice call to a PSTN extension for a networked client computer | Emerging Cross-Sectional Technologies | 241 | Expired |
| US6304637A | Method and apparatus for establishing and facilitating a direct quality voice call to a telephone extension on behalf of a client computer | Emerging Cross-Sectional Technologies | 120 | Expired |
| US5987102A | Method and apparatus for bridging a voice call including selective provision of information in non-audio to the caller | Electricity | 109 | Expired |
| US6199096A | Method and apparatus for synchronizing information browsing among multiple systems | Electricity | 98 | Expired |
| US6661878B1 | Method and apparatus for establishing a voice call to a PSTN extension for a networked client computer | Emerging Cross-Sectional Technologies | 43 | Expired |
| US6628760B2 | Method and apparatus for selecting an internet/PSTN changeover server for a packet based phone call | Emerging Cross-Sectional Technologies | 35 | Expired |
| US7248675B2 | Method and apparatus for establishing a voice call to a PSTN extension for a networked client computer | Emerging Cross-Sectional Technologies | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.