Douglas Rollender
29Patents
10h-index
12Co-inventors
64Inventor score
Filing activity: Sep 23, 1997 → Sep 14, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7565131B2 | Emergency call back through intersystem paging | Electricity | 124 | Expired |
| US7676215B2 | Emergency call back method | Electricity | 97 | Expired |
| US6912389B2 | Interworking and interoperability of GPRS systems with systems of other technology families | Electricity | 69 | Expired |
| US7764944B2 | Method of providing a unique call back number for wireless 9-1-1 calls | Electricity | 62 | Expired |
| US6138023A | Method for porting a directory number from one wireless service provider to another | Electricity | 51 | Expired |
| US6192242A | Method for poring a mobile directory number from one wireless service provider to another | Electricity | 46 | Expired |
| US7715821B2 | Method of updating a unique call back number for a wireless emergency call | Electricity | 27 | Expired |
| US7702308B2 | Method of associating data with a call to a call center | Electricity | 22 | Expired |
| US7302250B2 | Method of recognizing fraudulent wireless emergency service calls | Electricity | 19 | Expired |
| US7565130B2 | Emergency intersystem paging for emergency call back | Electricity | 11 | Expired |
| US6810261B1 | Method for transferring data using expanded permanent identifier | Electricity | 7 | Expired |
| US6603974B1 | Method for transferring data | Electricity | 5 | Expired |
| US7130384B2 | End user device supported emergency 9-1-1 function | Electricity | 5 | Expired |
| US7174149B2 | Method and system for indirectly establishing a call | Electricity | 5 | Expired |
| US6493553B1 | Mobile-station adapted for removable user identity modules | Electricity | 5 | Expired |
| US7352847B2 | Optimized routing of VoIP emergency calls | Electricity | 4 | Active |
| US6819921B2 | Method of subscriber initiated porting of a wireless number for a mobile station | Electricity | 4 | Expired |
| US8116720B2 | Method and apparatus for emergency call routing using an end node | Electricity | 3 | Active |
| US7480374B2 | Emergency service call back to a ported number | Electricity | 3 | Expired |
| US6944451B2 | Routing method for a call to a mobile telephone via global location register | Electricity | 3 | Expired |
| US6615045B1 | Method for transferring data upon request using permanent identifier | Electricity | 2 | Expired |
| US6748227B1 | Method for transferring data using permanent identifier including routing information | Electricity | 2 | Expired |
| US7184746B2 | Method and apparatus for providing network support for a wireless emergency call | Electricity | 1 | Expired |
| US7706773B2 | System and method for managing communication services provided to a mobile terminal using a temporary wireless directory number | Electricity | 1 | Active |
| US6882839B2 | One-way roaming from ANS-41 to GSM systems | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.