Roger S. Marshall
32Patents
6h-index
23Co-inventors
65Inventor score
Filing activity: Dec 19, 2003 → Jul 21, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6940950B2 | Enhanced E911 location information using voice over internet protocol (VoIP) | Electricity | 264 | Expired |
| US7260186B2 | Solutions for voice over internet protocol (VoIP) 911 location services | Electricity | 241 | Expired |
| US8185087B2 | Emergency 911 data messaging | Electricity | 81 | Active |
| US9313637B2 | Wireless emergency caller profile data delivery over a legacy interface | Electricity | 13 | Active |
| US7912446B2 | Solutions for voice over internet protocol (VoIP) 911 location services | Electricity | 8 | Active |
| US7929530B2 | Ancillary data support in session initiation protocol (SIP) messaging | Electricity | 7 | Active |
| US8385881B2 | Solutions for voice over internet protocol (VoIP) 911 location services | Electricity | 6 | Active |
| US9408046B2 | 911 data messaging | Electricity | 6 | Active |
| US9374696B2 | Automated proximate location association mechanism for wireless emergency services | Electricity | 4 | Active |
| US8059789B2 | Automatic location identification (ALI) emergency services pseudo key (ESPK) | Electricity | 4 | Active |
| US8874068B2 | Emergency 911 data messaging | Electricity | 4 | Active |
| US8983047B2 | Index of suspicion determination for communications request | Electricity | 3 | Active |
| US9596582B2 | Automated location determination to support VoIP E911 using self-surveying techniques for ad hoc wireless networks | Electricity | 3 | Active |
| US9131357B2 | Emergency 911 data messaging | Electricity | 2 | Active |
| US9160572B2 | Automated location determination to support VoIP E911 using self-surveying techniques for ad hoc wireless network | Electricity | 2 | Active |
| US9307078B2 | Index of suspicion determination for communications request | Electricity | 2 | Active |
| US7903791B2 | Enhanced E911 location information using voice over internet protocol (VoIP) | Electricity | 1 | Active |
| US9532387B2 | Ancillary data for an emergency services call | Electricity | 1 | Active |
| US9430935B2 | Emergency event message | Electricity | 1 | Active |
| US9237228B2 | Solutions for voice over internet protocol (VoIP) 911 location services | Electricity | 1 | Active |
| US8873718B2 | Enhanced E911 location information using voice over internet protocol (VoIP) | Electricity | 1 | Active |
| US9197992B2 | User plane location services over session initiation protocol (SIP) | Electricity | 1 | Active |
| US9130963B2 | Ancillary data support in session initiation protocol (SIP) messaging | Electricity | 0 | Active |
| US8798572B2 | Solutions for voice over internet protocol (VoIP) 911 location services | Electricity | 0 | Active |
| US9467836B2 | Enhanced E911 location information using voice over internet protocol (VoIP) | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.