David C. Robbins
27Patents
8h-index
18Co-inventors
72Inventor score
Filing activity: Dec 14, 1982 → Jul 29, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6782412B2 | Systems and methods for providing unified multimedia communication services | Electricity | 479 | Expired |
| US7668157B2 | Presence based telephony | Electricity | 221 | Active |
| US4480217A | Automatic velocity calibrator for a velocity servo loop in a magnetic disk drive | Physics | 20 | Expired |
| US8885639B1 | Method and system for providing talking call waiting in a SIP-based network | Electricity | 19 | Active |
| US7251317B1 | Methods and systems for making telephone calls | Electricity | 19 | Expired |
| US7159039B1 | Systems and methods for providing in-band and out-band message processing | Physics | 17 | Expired |
| US8116302B1 | Method and system for providing call screening in a packet-switched network | Electricity | 13 | Active |
| US8320365B2 | Presence based telephony | Electricity | 9 | Active |
| US8839397B2 | End point context and trust level determination | Physics | 7 | Active |
| US8908835B1 | Method and system for providing forced hold behavior in a SIP-based network | Electricity | 7 | Active |
| US8130639B1 | Method and system for providing distinctive announcements in a SIP-based network | Electricity | 5 | Active |
| US8406407B2 | System and method for providing custom alerts | Electricity | 4 | Active |
| US8363812B1 | Method and system for providing call parking in a SIP-based network | Electricity | 4 | Active |
| US8462772B1 | Method and system for providing party line emulation in a SIP-based network | Electricity | 3 | Active |
| US8144693B1 | Method and system for providing telemetry, verification and/or other access in a SIP-based network | Electricity | 2 | Active |
| US8165280B1 | Method and system for providing busy override service in a SIP-based network | Electricity | 2 | Active |
| US9319530B2 | Method and system for providing telemetry, verification and/or other access in a SIP-based network | Electricity | 2 | Active |
| US9191521B2 | Method and system for providing call waiting features in a SIP-based network | Electricity | 1 | Active |
| US8320532B1 | Method and system for providing voice dialing service in a SIP-based network | Electricity | 1 | Active |
| US9241074B1 | Method and system for providing variable dial pattern provisioning in a SIP-based network | Electricity | 1 | Active |
| US7424101B2 | Methods and systems for making telephone calls | Electricity | 0 | Active |
| US9942692B2 | One touch machine to machine device connection | Electricity | 0 | Active |
| US8374166B1 | Method and system for providing call waiting features in a SIP-based network | Electricity | 0 | Active |
| US8867725B2 | System and method for providing custom alerts | Electricity | 0 | Active |
| US8467318B2 | Method and system for transferring in-progress communication between communication devices | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.